It's a tough thing to deal with. No one can tell you how long...because everyone has their own way of being about that.

I can say that in the past I have repeatedly allowed myself to be bothered and depressed far too long over breakups. I had difficulty forgiving both myself and the other person...and sometimes far more difficulty forgiving myself (for having supposedly "failed" in some way). Such thoughts are pointless. But that's easy to say.

Every relationship is a great learning experience. Very few are meant to last a lifetime. If you can remember the good that came out of it, accept the rest as useful lessons, and forgive whatever still hurts...that's a good start.

But you have to decide all that as it suits you best.

The past is gone. Why give it power to still hurt you now? The present is the real gift of life, and it's full of possibility.