I've been in the situation where I was okay with losing someone until they started sleeping with someone else. Maybe it feels so bad because now you have the knowledge that she's absolutely unavailable to you. She's moved on. It also seems like you have a bit of wanting what you don't have: when you were with her you wanted to be away from her and now that you're away from her you want to be with her. It's that constant dissatisfaction with the current circumstance that's a part of this addiction. Also, we tend to like chaos and dis-ease. I know it doesn't feel as if you're creating the situation yourself, I know it feels very real, so it's difficult to see that there may be other motives in place. But all addicts use different things to change how they feel. Alcoholics use alcohol, addicts use drugs, and sex, love and relationship addicts obsess about sex, love and relationships. To us it doesn't even matter if we're in love or pain over love: it's still changing how we feel, it's taking us away from our real lives and that's what we're after. There are so many different ways of acting out on this addiction and so many aspects of it. This comes off the LAA site:
Love addiction comes in many forms. Some love addicts carry a torch for unavailable people. Some love addicts obsess when they fall in love. Some love addicts get addicted to the euphoric effects of romance. Others cannot let go of a toxic relationship even if they are unhappy, depressed, lonely, neglected or in danger. Some love addicts are codependent and others are narcissistic. Some love addicts use sex to manage feelings; others are sexually anorexic. What we all have in common is that we are powerless over our distorted thoughts, feelings and behavior when it comes to love, fantasies and relationships.
And these are the aspects of a love addict off the site:
You are very needy when it comes to relationships.
You fall in love very easily and too quickly.
When you fall in love, you can’t stop fantasizing—even to do important things. You can’t help yourself.
Sometimes, when you are lonely and looking for companionship, you lower your standards and settle for less than you want or deserve.
When you are in a relationship, you tend to smother your partner.
More than once, you have gotten involved with someone who is unable to commit—hoping he or she will change.
Once you have bonded with someone, you can’t let go.
When you are attracted to someone, you will ignore all the warning signs that this person is not good for you.
Initial attraction is more important to you than anything else when it comes to falling in love and choosing a partner. Falling in love over time does not appeal to you and is not an option.
When you are in love, you trust people who are not trustworthy. The rest of the time you have a hard time trusting people.
When a relationship ends, you feel your life is over and more than once you have thought about suicide because of a failed relationship.
You take on more than your share of responsibility for the survival of a relationship.
Love and relationships are the only things that interest you.
In some of your relationships you were the only one in love.
You are overwhelmed with loneliness when you are not in love or in a relationship.
You cannot stand being alone. You do not enjoy your own company.
More than once, you have gotten involved with the wrong person to avoid being lonely.
You are terrified of never finding someone to love.
You feel inadequate if you are not in a relationship.
You cannot say no when you are in love or if your partner threatens to leave you.
You try very hard to be who your partner wants you to be. You will do anything to please him or her—even abandon yourself (sacrifice what you want, need and value).
When you are in love, you only see what you want to see. You distort reality to quell anxiety and feed your fantasies.
You have a high tolerance for suffering in relationships. You are willing to suffer neglect, depression, loneliness, dishonesty—even abuse—to avoid the pain of separation anxiety (what you feel when you are not with someone you have bonded with).
More than once, you have carried a torch for someone and it was agonizing.
You love romance. You have had more than one romantic interest at a time even when it involved dishonesty.
You have stayed with an abusive person.
Fantasies about someone you love, even if he or she is unavailable, are more important to you than meeting someone who is available.
You are terrified of being abandoned. Even the slightest rejection feels like abandonment and it makes you feel horrible.
You chase after people who have rejected you and try desperately to change their minds.
When you are in love, you are overly possessive and jealous.
More than once, you have neglected family or friends because of your relationship.
You have no impulse control when you are in love.
You feel an overwhelming need to check up on someone you are in love with.
More than once, you have spied on someone you are in love with.
You pursue someone you are in love with even if he or she is with another person.
If you are part of a love triangle (three people), you believe all is fair in love and war. You do not walk away.
Love is the most important thing in the world to you.
Even if you are not in a relationship, you still fantasize about love all the time— either someone you once loved or the perfect person who is going to come into your life someday.
As far back as you can remember, you have been preoccupied with love and romantic fantasies.
You feel powerless when you fall in love—as if you are in some kind of trance or under a spell. You lose your ability to make wise choices.
Hope that helps with a bit more clarity. I found the meetings a wonderful place to mix with people who were exactly like me. I could deal with my issues week by week and got a lot of support there. They advise that you try out about 6 meetings. If you still don't feel it's your thing, there may be other ways: there may be Facing the Shadows groups in your area, love addiction counselors and therapists who understand the addiction. The best place to start looking for the latter things I mentioned is to call a 12 step rehab facility and ask them if they know of any independent counselors and what therapists they use. It's better to use their therapists because you will know these docs understand addiction. I have found that using therapists who don't understand it can be very destructive, even though they help many other kinds of people. There aren't that many therapists who understand addiction fully. Google is always useful too. You should be able to find meeting lists on the net, or contact numbers for meetings in your area. Which country do you live in?
I really hope you manage to get help.I hope this marks the end of your suffering. You can PM me any time, too, if you have questions.