On the verge of giving up, intrusive thoughts taking over

Hi all,
I am posting this both in the Relationship forum as well as the OCD forum since I feel it could be put in either section. As the title suggests I am suffering more and more from intrusive thoughts and it has got to the stage where they are completely dominating my live, to the extent where I don't know what are my genuine thoughts or intrusive ones. It also is leaving me with a feeling that I am developing a mild form of schizophenia. I feel as if I have a constant internal battle going on with 2 different sides of me. The biggest reason for posting this is that I feel I have let my girlfriend down in a big way. She has been fantastic to me and yet part of me lets her down constantly. Perhaps I am actually not letting her down but I will try and put my thoughts down and leave it for others to judge and advise. When I am around other females, some of whom I barely know, whether it be in a workplace situation or a social situation I feel like being nice to them and sociable and wanting to be physically close to them, i.e standing next to them or at least be near them. Why the hell would I want to do that when I am in a relationship with a fantastic girl. Am I developing into some form of sex pest in years to come, or am I going to be a serial cheater. Whatever the case I feel absolutely awful because the disciplined/normal part of my head is completely appalled at the lack of respect I appear to be showing my girlfriend and it is leaving me with strong feelings of guilt. I haven't at any point cheated on my gf and I don't think I ever would. I know I have only typed think there but I have so many strong doubts about a lot of things I don't know what to think. My head is in a mess and part of me is thinking about breaking up with my gf to try and give my head time to settle. I am constantly battling intrusive thoughts as well as "catastrophising" and this is leaving me emotionally drained.

go to your doctor immediatedly and ask for a prescription for zeldox. Amazingly intrusive thoughts are not caused by anything messed up in your head, but just be an imbalance of neurotransmitters in your brain. It is 100% treatable if you take your meds and you can definitely return to your normal life within a few weeks of treatment.

I know what you mean because I deal with the exact same thing, I can't tell whats an intrusive and what are my real thoughts, somebody told me you can think anything you want as long as dont act on it, your not trying to cheat on your girlfriend, your just dealing with an intrusive thought, one of the major things in OCD, get treatment but give yourself a break and try meditation, one of the things that can help is rolling your eyes into the back of your head because it changes the brain wave state your in
but dont beat yourself up man, its normal for OCD sufferers even people in general to have intrusive thoughts