Dont know What should I do?

We havent spoken in year(my friend and I) and now she misses me? What should I do? She has feelings for me

You should send her a message on Facebook or text her but how do u know she misses you if you haven't spoken?

How you feel is more important. If you also miss her and want to restart the friendship, then talk to her. If you're just fine without her in your life or don't want to rehash the issues that ended the friendship in the first place, then you aren't obligated to communicate with her just because she misses you.