A girl which I love but she loves other? What should I do?

Think of her happiness 1st,, if she loves someone else, hope that he loves her back and she gets all the happiness that she deserves...

When you say
she loves other do you mean she's already in a relationship? Or do you mean she is pursuing someone else?

If she doesn't love you back there isn't much you can do. Leave her and hope the best for her.

How to find somebody yes with a picture