It sounds like that you have already made up your mind with regards to breaking up with him. I would say that you are very wise. If a relationship makes you unhappy then there is no point in staying in it as you will end up hurting yourself and hurting the other person more in the long-run.
I think what you need now though is to experience life, and by this I mean not starting to see this other guy straight away. You need time to make sure that it's not just a make me feel good rebound relationship as this would end in tears as well or even put you back in the same situation as you are in now.
When I was 18 I had my first child and I married at 19, by 20 our relationship was over and now I am struggling so I don't think it is unwise for you to want to do all the things he has done and experience them too the full.
I never had the chance to do all those things and I now wish that I had.
16 is very young to make such big decissions about who you want to spend the rest of your life with and it is a decission that shouldn't be taken lightly. Everyone changes so much over time, especially when they are young so the chances are you would gradually drift apart anyway. There are very few relationships that I have heard of who have been together since your age and that is why.
I have to say that your current boyfriend is right, you will get tired of the clubs after a while but this is something you need to find out for yourself.
If you ask me you need time on your own, to not only heal after this relationship ends but to find out who you are as a person and what direction you want to take.
Good luck
xxx