Chronic over worrying and self blaming

To say that I worry a lot would be a massive understatement. I worry to the point that it is debilitating. Recently, I have actually lost some weight due to not being able to eat because of worry. While I could stand to drop a few pounds, it's bad that it is happening this way. I also have an extreme fear of abandonment. That is due to the fact that I have been abandoned in the past by people who I thought were my friends. People that I loved dearly. There is someone in my life now who I absolutely love with all of my heart. This person and I share a very special bond. I know that nothing is forever, but I want this person in my life for as long as they can possibly be. For the remainder of our lives if possible. Recently, when this person failed to reply to messages, I got worried to the point that I could not function. I mean, I could not eat or sleep. I thought for certain that I had done something to make them no longer want to have anything to do with me, even though I could not think of anything that I may have done. I just knew that I had to have done something. Someone told me that I was worried over nothing. That this person not replying probably had nothing to do with me personally.

I could see their point. However, what bothered me was, it just was not like this person to just flat out not respond like this. Even if they were otherwise occupied, they would always tell me that. Plus, they would even say something like "hit me up tomorrow when I will have more time to talk". But, this time, there was nothing. I got a really bad vibe from it. I went into such a state of worry. I broke down emotionally. Then, I tried again the next day. I figured I had nothing to lose. Also, as someone pointed out to me, if she truly wanted nothing more to do with me, then she would just unfriend and/or block me, and in fact, would have already done it by now. So, I try again the next day, and she replies and everything seems okay. I was greatly relieved, and I asked if everything was alright, because she had me worried when she did not reply the day before. She said that that had absolutely nothing to do with me. I was glad to hear that, but I still worried a little. I took that to mean that she was not replying to anyone else either. I wasn't sure, because she did not elaborate on it.

I have this issue where I worry. I worry to a point that I can not think straight. It interferes with my daily life when I am in such a state of worry. I forget to do things. I walk around in a perpetual daze. I hate that I get like this. But, it seems like it is out of my control. Plus, there is the self blame. I immediately assume that something is all my fault. If someone acts strange, or out of character, then I automatically think that it is because of me personally. And even when I can't think of anything that I may have done, I convince myself that I most certainly have done something and it was completely and totally unforgivable. Should I seek professional help for this? Perhaps get on some sort of medication? I need to do something because it is to a point where I am afraid that I am going to worry myself physically sick. Or, if it gets too out of control, I may harm myself. Any thoughts?

I worry as well. my friend said 'you're seeking a perfect world which doesn't exist'
venting to this friend helps a lot.

i get worried even when i have to cross the street. if someone is walking toward me, i start trembling whether should i move left or right or should i stop and wait for the other person to move or should i gesture the other person to stop and i'll move or should i gesture the other person to move while i continue walking.

so you're not alone.

it's very very exhausting on the mind and people get fed up of me easily.