First I'd like to say hello to everyone since I really don't post, just enjoy reading good discussions and well, looking at dirty pics
My Ex and I have been apart for about a month now. We were together for 3 years, which is an incredible amount of time for me since she was my 23rd GF from the time I was 15-21. I'm now 24 and I fear that the "old" me has come back from the depths.
I used to cheat like crazy, date 2+ girls at the same time, etc. Basically I didn't care. I do want to stress that I was never cruel or caused anyone pain. Just about all of my breakups went smoothly and everyone moved on.
Now.... I met my ex 3 years ago and she had only been with 2 other guys before me who were complete jerks. I'm typically a really nice guy with a craving for sex at least once a day or more although it doesn't HAVE to be that often.
During the 1st 6 months everything was great. We had sex regularly and it was good. She wouldn't give me a BJ or
Anal, but she was just scared at that time so we took it slow. 1st came the BJ. She actually started enjoying it and would give me a BJ while I was coding something on the PC, lol. Great times.
Then came
anal - it took a while for her to enjoy it. We tried a bunch of ways until we found out that the only position for her to enjoy
anal was for her to be on her back with her legs spread. Then she loved it.
***
All of a sudden everything did a 180. She got a lung infection and after it went away her sexdrive went from 100% to about 20% - instantly. She also didn't like chocolate anymore and I couldn't explain it. Everything just got worse from there. I always told myself that things would get better and we could work this out.
Anothe 1.5 years went by (been together for 2 years now) and things had kind of leveled out to having sex every week or so

Thought it would get better.
Then for the last year it was just crazy. She refused to give me a BJ. She said that she didn't want to do it because it made her feel sick
Then she didn't want to do anal anymore because it was gross
So WTF happened???
About 6 months ago I couldn't take it anymore and told her she needs to put out or leave - literally - and she said it was my problem - not hers
I told her flat out that I would go and cheat on her if she kept this up since I had started fantasysing about other women. She didn't have any reaction.
So I did it and had sex with someone else just to get the sex that I longed for.
Then about 1.5 months ago she got into my email account (a failure to close it on my part) and read all my messages
So I admitted to it and she was, of course, furious but wouldn't understand my reasons for doing so.
Then she said she was going to move away so she didn't have to see me again and I later found out she was trying to start a relationship with her 1st cousin down there

WTF
So I don't know if they've had sex or not but that's IMO just sick. She says she still has feelings for me but she doesn't know why she doesn't want to have sex with me anymore.
Hell, I'd be fine with sex at lest 3 times a week, or something on a regular basis but the once every 3-4 weeks during the last 6 months was just unbearable.
What the hell happened? How can a person do a complete 180 in regards to their sex drive? I have never encountered anything like this before. Personally i think she needs to see a shrink if she's planning on hooking up with me again.
Anyone have any advice/comments/or related stories to help me understand what could have happened? I don't think a lung infection could have caused all of this and I know that I didn't do anything that may have affected her in that way.