I came out of a 5 year relationship at least 9 months ago. im relieved to be out of it, as it just wasnt going anywhere. im very happy though, being free spirited and unattached...
i met a wonderful guy a few months ago.He is pretty much everything i have ever wanted and we just set it off and became close enough....well until he told me that he has a girlfriend....of 4 years! i was furious and felt to never talk to him again and cut him off completely...
but for some reason i didnt...and we are still talking. he explained his situation to me, and at first i thought it was a bogus story (cz thats all you get these days)and then with time i came to understand and empathise with him. moreso, im a forensic mental health worker:

He told me that his girlfriend suffered from depression. is now better, but isnt able to have sex with him anymore. in fact its been 2 years now. i advised him as best i could about depression and suggested that he support her through therapy etc, of which he said she has already been to.i even recommended other specialists that im familiar with. he said he has tried it all, and feels he has come to a dead end and thinks about sex soo often it hurts.he said he has tried talking, etc but doesnt want to push too much as something traumatic happened to her, and he doesnt want to appear insensitive.He explained that he doesnt feel like a man anymore, misses the passion, desire etc, and toyed with the idea of having that with someone new (me).he has explained that all this is not her fault and said that he also doesnt want to abandon her. i know what id like to say....
but has said that he cant leave her because he cant 'kick someone when they are down', and he feels so much for her.

i know the timing bloody sucks, but i do want this man. had i known he was taken i wouldnt have entertained any kind of feelings with him our attraction to each other is mutual in that it is on both an intellectual and physical/sexual level. im left in a position where im thinking that i could be what he needs at the moment( SEX SEX SEX, the excitement, passion, laughter, friendship) but whats annoying me is that i dont know whether to stick around in the background, or just leave it. but im really not willing to be his girl on the side, and i have made this clear, but ive been on the receiving end when someone has left me too.....

i really dont want to involve myself in this more than i have to

WHAT TO DO?