What do I do? She said shes afraid to be in a relationship with me?

I believe that you should talk to her just like your talking here. If after she hears how you feel she doesn't want to be in a relationship it's because she's not willing to put the effort into it.By that I mean that she doesn't like you enough to actually put her heart at risk. Her heart is not the only one being at risk and she has to understand that, because your heart is just as valuable and fragile as hers. Try talking to her from the heart. And if nothing good comes out of it yeah you might have a broken heart but at least you will not carry the doubt your whole life of the "what if". Hope I helped : )