I don't think there is any problem with an age difference. The biggest thing is to realize that there is an age difference, he has lived a little longer and has more experience. That should be recognized when making decisions. You are younger and may or may not be as mature or responsible as he is. I am not saying you are or aren't, and it shouldn't make that big of a difference. If this is what you both want then I say go for it!! I don't think age should stand in your way.
Hugs,
Kindle