<human>: So basically, my boyfriend of around 4 months knows this girl that's an artist.  He has told me before that every time they have hung out, they've hooked up.  Today, she posted on his Facebook wall saying that she wants to paint him.

Now he already knows I have serious anxiety and trust issues, and we haven't been having the best of times while I have been dealing with my issues.  I am extremely paranoid and afraid of him cheating on me, which I know is not healthy.

On the other hand, I feel like painting someone is a fairly intimate thing.  They would be spending at least a few hours alone together and I just don't know if that's okay or even how to go about discussing it with him.  I am really afraid he will tell me that he is going to do it even if I tell him it will hurt my feelings and I am uncomfortable with it.  Please help me.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: My boyfriend has an ex-hookup that wants to paint him and I don't know how to react to this kind of thing.