Friends with Benefits

I recently met an amazing guy unexpectedly and I knew I just had to keep in touch. As I learned more about him I found out he is going through a divorce. But he keeps asking for us to be FWB. I don't know if I should I'm scared I'll fall for him or I'll get a bf and he will never want to see me again as a friend. I'm only 20 and he is 10 years older although I would love a bf I know he can't be that for me. Any advice on whether or not to try it? Also how to deal with emotions?