Oh just get it over with already. Then the makeup sex will be even better.
Do you guys want to be together or not? It's really up to you two.
If you're really concerned about everyone's opinions maybe you should use the poll function and allow everyone to vote on it.
If it's purely about about age - then no, it doesn't make sense to break up. If it's because you are both at dramatically different stages in your lives and you'll both have to make big sacrifices in order to stay together, you should really look at what you'll have to sacrifice and if it's worth it.
If you're a believer in the idea that there's only one specific person for you, then you probably won't want to break up. If you think that there are lots of neat people out there and that you will be able to love again in the future, maybe you should break up.
I don't know anything about you, other than the small tidbits you've posted on this thread and the other one you started. What are the issues you are facing other than age? What are the issues you are facing related to age?
IE. Our social life has been very difficult because she likes to go to pubs regularly and I'm too young to go. This means that I can't spend nearly as much time with her as I would like to. Do you think maybe I should date some other people on nights when she's busy with her older friends?