i am 32 and my b/f is a divorced 51 y.o man. i love him very much, and he is very kind hearted.
you have to have along talk with him and tell him how you feel, and how he feels.
my ex monster b/f talked about his ex a lot, and i let it go. and during the 5 years i was with him, 2 1/2 years he was in love with his ex.
please do not walk into a relationship without knowing the guy completely.
have you heard of the 6 month rule, that's how long it takes to really get to know someone. 50% of marriages end in divorce, so dont rush into things.
marry him if your heart and mind is 100% that this guy is the one.
good luck