My guy friend has a girlfriend but is still attracted to me?

My story is complicated so I'll keep it brief. I have a guy friend/love interest and about nine months ago he confessed that he was dating a girl and naturally the news devastated me since he knows that I like/love him dearly. After this, and out of denial, I started to do sexual favors for him like sending naked photos, masturbation webcam sessions and even sent him a birthday gift only to realize that I was being used and abused as the other woman. I became depressed and feared men.

I do know that he has a past of being sexually addicted, sleeping around and a recovering alcoholic despite his academic success. He even implied that he'd cheat on her to sleep with me if he could. I told him off and he grew bitter. In support to see him 'happy' and for my well-being, I started talking to him less not to interfere in his budding relationship.

Recently, he asked me if I still was sexually attracted to him and I said yes. He claims that he doesn't know if it's bad that he still whacks one off to my dressed and undressed photos. I don't know if he feels something for me, is planning to leave his girlfriend or whether this is all a trap he's trying to lure me in because he knows I'm whipped and will support his endeavours (non-sexually).

Is this normal?
P.S. I'm only 20 and still a virgin...