>>1
I think you should try it if you feel like it will work!
If you're happy together, then because it seems like you're mature enough to know there might be problems because of the age gap, then there is really no reason to hold back.
Just be aware that you might be looked on upon by other people, and you might not be approved of all the time.
If you don't mind that, do like >>3 said and make sure he's not married, then go on and try and make this work!
Good luck!!