I hope this is the right place to post this, I'm new.
My problem is with my relationship with my boyfriend. I'm 20, he is 22. We have been together about 9 months and have lived together for just over 7 - things started fast like that, but mostly due to circumstance.

I discovered after a few months that he had lied about certain things in his past. As time goes on, i discover more and more things that he has lied about. He told me that he lived in Canada with his fiancee for a year, and that when he proposed, it was very special for him. He was never engaged, and he has never left the country. He told me that he travelled the US and had different adventures - writing songs beside the mississippi, doing cocaine with a girl in new york.. etc. None of this was true, some made up to impress me, and others to make me jealous. He told me he had slept with many girls that he had brought home for the bar that he works in - and that I now work in too (again, circumstance, im not so clingy that i need to work beside him, things just happened that way). This man-whoring part i hoped was untrue but in fact was only exaggerated. He made up all sorts of stories - he even told me that he had bipolar disease and that after self medicating with codeine, he was miraculously rid of it. I had no knowledge of bipolar, and believed his story of codeine being able to alter brain chemistry, so it was about six months before i became aware that this is quite impossible. When confronted, it took a long time of constant arguing for him to admit that he just made it up.

His lying, when he first started to admit things, was mostly a relief. i didn't mind so much at the time. But over time, its worked on me and as I find out more and more things that are untrue, I've began to trust him less and less. Not only this, but he still lies in everyday life. Like, who he has been texting, who he met in the street, things hes done etc. And the things that he lies about, arent anything to do with cheating or anything bad - just everyday things. Like saying he met Paul and Ross in the street when he only met Paul.

Other things have shaken my trust in him, like how every song that he writes (he is a musician, as i once was) is about his ex girlfriends. The fact that he made out his past relationships were more serious than they really were, or how he avoids things and changes the subject. Instead of talking openly about ex girlfriends, he will lie and be avoidant. It seems that he is still in that stage of hating them because they arent together anymore - that way of being bitter and immature after a breakup. So it is hard for me to hear any stories about them or times when he was with them, because the whole thing is shrouded in mystery and i feel like there is something i dont know.

Its hard to explain in words all the things that he has lied about and the effect that it has on me. I feel bitter and angry all the time, I work at the same place that he used to bring women home from and it makes me sick to think of it. I don't know how to get over the bitterness and the jealousy, that I know I shouldn't feel in the first place. When it is brought up, I don't know what is lies and what isn't, and I feel the need to lash out with words to hurt him. I can't trust anything he says.

But.. we have been together a fairly long time. I feel safe with him, and the though of leaving him is distressing. He looks after me, he is sweet and caring most of the time, and we have talked about marriage. Until his lies started wearing me down, things went fabulously. And now, it feels like we have lost everything in common, I can't trust him, and to be around him just makes me angry and bitter. I don't want to leave him though, and I'm very confused. Forgive me please for not being very clear in this post, I dont know really how to portray what exactly is going on. I just need some advice, any advice. On what my next move should be, how to stay together, how to not be angry and bitter, and .. I just want to be happy.