If one is 15 and the other 20, that is too much of an age gap because one is mature and experienced in life (the 20 year old) and the other is immature and inexperienced in life. That's asking for trouble. But if both are in the adult age range (20 and 25, 25 and 30, etc) neither has the advantage of experience to the point that it is a problem.
If you are an adult, and he is a minor, it is bad. But, if not, anyone (in my opinion and with how mature they are) anyone under 15 is not old enough to date yet. But, if you are both adults, then no, there is nothing wrong with it.
God might have other plans for u pray and wait for ur answer if one is s minor it is a federal offense and u will b considered a sexual preditor and if convicted will have to register as a sexual offender forever and anyone can look it up also u piss them or their parents off and u can go to jail for staitory rape whether u did anything or not