It's not the age difference I'd be worrying about, as I have done that myself (and currently am). It's the fact you don't want kids that would really affect you adversely if you just ignored that and jumped in. Now if you had told me they're both planning to move away for college, etc., then that might be ok.
No you should not persue this guy. If your not a kid person they shouldn't have to endure you being in their life. They shouldn't have to be put through getting to know you and maybe getting to like you just to have you dump them later