how do I get over a breakup 2 months before my wedding
?

Same way you get over anything else--day by day. Give yourself time to grieve your loss & focus on you. Treat yourself well (I like to do it with facials & pedicures & maybe some ice cream). Remind yourself that this feeling won't last forever & you will get through this. It's hard to believe now, but there is someone better waiting for you!

Just think how fortunate it is that it happened before your wedding. Imagine if it had been afterwards? Just what sugarcookie said--take your time, do your crying--it's ok to cry. Look after yourself, do all the stuff you want to do in life. You will get through this.