I'm so worried that I will get angry.?

I think you need to just give it time, you hurt her first. She trusted you and you let her down (by telling her secret). Since you really love her, what I would do is take it back to square one: sit down with her and tell her you would like to start over and take it slow, and you'll do whatever it takes to regain her trust, no matter how long it takes. You should understand it's going to take time to regain her trust. If it's meant to be, it'll happen again.