Is there something wrong with me?

I don't think it would be fair to tell him to get a divorce or you're leaving him. You should talk to him about it and see how he feels. Maybe he's worried about what he might lose in the divorce and is comfortable the way things are,which would be understandable. It's also understandable to want him to get divorced.  

No I do not think you should ask him to get a divorce , but I also would not be having an afair  with a MARRIED MAN .  Why did you let this happen ? Do you not find it odd that after a 3 year separation from his wife that he's not divorced .   Then let's throw in 2 years of committing adultery with you , do you not see some oddness here .  Are you sure he and his wife are not living together , or are at least still in some sort of a relationship , are you sure he is not in love with his wife and he's using you as a side adventure .  You would think if his marriage was over they would be divorced .  If he loved you he would do it on his own .  You may be in a dead end affair with a married man .  If you ever get married certainly hope you remember what goes around comes around .  It is never smart to get involved with a married man .

Hi Christy,
You received 2 excellent answers (gave them 2 thumbs up each).  I would like to add: Yes you have all the rights to do it.  You gave him 2 years of your life and it is very normal to know were your relations are going to.  However I wouldn't suggest to go directly.... better discuss your relations in general..... only if he says he is very serious and see himself with you till the end of his life than you should ask him to translate his words to actions..... I take it for granted that he is really seperated and has no connections with his wife (very bad if that's not the case !!!!).
Best regards,

Hi Christy,

    Why has he not filed a divorce if he is separated for 3 years?  Have you asked him this question?  You know, some men tell women they are separated so they can fool around .  I just hope he is  not this kind of man.  If I was in your position,  I'd ask him where the relationship is going and if there a chance for permanency and commitment.  If he gives you a run around, then I would consider moving on and finding someone who is available and single and also wants commitment.

     Don't waste your time on a man who does not want to commit.  You deserve better.  I wish you the best.

i think u should leave that man n find some one who is single. because if he really love u , he would of divorce his wife a very long time. friends of mind have experience the same that's happin 2 u n in the end he never leaves his wife . they does make up back evenually. so quit now while u're still young ...and God loves u . just ask him 2 show u the right person that for u