What would you think of him or me for that matter?

This man claimed to have a special bond with me and feelings, but he sustained a number of flirtatious friendships, even though he knew it upset me. I told him it did and that I wouldn't have a relationship with him as long as he flirted, but had no problem with him being their friends. He cannot get what my problem is. One girl in particular and he flirt heavily. It doesn't help that she is a model. As I am not in a relationship with him, and our friendship has suffered largely due to my jealousy and his intolerance of it, he tends to avoid me when she is there and has no qualms about flirting with her in front of me. Again, he doesn't seem to see the problem. He claims it is just innocent fun and that it is me he has feelings for. Things took a nasty turn, this model turned on me and was subltlely bullying me, glaring at me, pretending she was with him etc. I said nothing to him, but she showed her hand one day in front of him and to be fair, he stood by me. I really made an effort to be his friend again, he responded really well at first, then for no reason, suddenly got upset and turned away from me, back to his old routine of flirting in front of me. He is getting to the stage now where if he sees me in a room he walks back out again, but at other times is OK and I catch him staring at me a lot. If I look well, he won't even look at me. So I am distant now too. The model and him fell out for a while too while all this was happening, but recently seem to be OK again. I still love him but don't know what to do and if I have been unreasonable, please tell me.