Does physical attraction so important for marriage life?

Ive divorced woman with a baby boy, not so sheldom i found a coworker had a crush on me .. some are serious and some other a player. This one man is serious to the marriage step as he asked me... ive been trying to open my heart for him, so far i can only see his intention and whether he prepared enough for that step. Juz one thing, i still can't have a bit physical attraction for him... i doubt if i can be loyal and true to him if my heart stays reject him.... kindly advice me please.. thanx.