Valexand...This is all so emotionally abusive, I don't even know where to start. This man is incapable of being faithful to one woman, and I feel sorry for his "wife!" He is looking for someone (you, it seems) to have on the side, just as he did with the other girlfriend while you were involved with him those years ago.

I have to say that I doubt he is marrying this woman for love. Men like this don't really know how to love (anyone but themselves). You've already mentioned she is unattractive. Is she rich, perhaps!? There are all kinds of motives for a man like this to marry.

You stated:
"Another conference is coming, this June. He'll be there again and this time he's bringing her as well. The happy couple. I'm going to be single and alone, again. He always sees me this way. Once he even made a comment about it too "I'm happy to see you so happy even though you are alone!".

First of all, I doubt they'll be a "happy couple." This type of man is always scanning the horizon for new victims. Don't be his victim anymore. His wife, unless she is oblivious or has blinders on, will soon realize this. He is going to be thinking of his wife as a dead weight to his freedom and seductions. Don't let him draw you into this. If you must interact with him, do so politely and impersonally, smile with confidence and greet his wife warmly...then get away from him with the grace and dignity you have inside of you. Even if he has his wife with him, he will probably try to get you off alone to talk. Don't do it! Don't accept any dinner invitations with him or with him and wife. You are busy, have plans, and have friends you're meeting. You are an exciting single gal having fun! How everyone envys a single career woman who knows where she's going. This is the attitude you should cultivate. Also, you DON'T need to have a boyfriend at your side to get revenge. The best revenge is your happiness and moving on with your life! If he has to see you, let him see this!
Love
Patty