What should I do? This is not sitting well with me, kinda feel like sh*t. Please read.

My last girlfriend and I broke up two years ago. It's been difficult and it took a while to get/getting over her because I was very much in love with her. I felt a real connection. We were together for 8mths, and things just went bad the last 6wks of the relationship; lost my job of 4yrs company went out of business, found a new job but it was very stressful, from the stress of a job hunt my commuting for school and band having a girlfriend sort of caused me to lose touch with a lot of friends, she is/was addicted to oxycontin which probably explains her bipolar/weird behavior at times, she sometimes thought I was condescending to her (never ever had anyone say/feel that about me before)> all those things pretty much contributed to it ending. She broke up with me, but it was kinda ambiguous: a couple weeks went by and I called her because I missed her and still had feelings for her, she told me that she broke up with me because I was difficult to be around and it was not because she didn't love me, and she said she'd call me when she was ready to communicate again. Month or two would go by and I'd text or email her to say "hello", she appreciated the sentiment but she was annoyed at the same time. Last time we spoke was about 6 months after we broke up, we talked for a while, she still was not ready/wanting to be with me again. Got to the point where I just couldn't handle this pending or open-ended with no real answer. I asked her if she could just please tell me that she'd either get in touch with me at some time OR tell me she never wants to speak to /see me again, because I needed some real closure; she wouldn't/couldn't do either. Very saddened by this, I said goodbye, deleted her contact.

I've had no luck with women since. Been on a couple dates with 3 different women, but didn't go anywhere. A few women have shown interest in me, but for some reason part of my thought process for has been "this girl doesn't have a sense of humor, little or no similar interest, she's not as good looking as my ex... this isn't for me". I can't tell if it's just coincidence that I'm not attracted to these women OR if I'm comparing things to my past relationship/my ex which is what is preventing me from connecting, if that makes any sense. I kinda feel like a mega pathetic asshole douche and I don't know what to do. This hasn't been sitting well with me.

Also, one of my best friends is good friends with my ex and it's his birthday this weekend where he wants to celebrate with friends. I'm pretty sure that my ex will be there. She has a boyfriend now, whatever. I'm kinda hesitant to go because for a long time I've been doing anything I can to get over this and the sight of her could just bring up bad feelings/memories that I don't want to deal with now, don't want to bail on my friend because of her that'd be lame, might be weird might not, it'd be a true test for me that I may win or lose. I just don't know what to do about all this. Any help would be appreciated
What should I do? This is not sitting well with me, kinda feel like sh*t. Please read.
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