I don't think it's about forgetting or losing those hobbies due to a bad memory. If you seem down I would advise to just take a break from it.

I don't see having bad memories involving a hobby/interest to be a burden, see it more as a stepping stone. If you can surpass the feeling of not wanting to go near it then in some ways it makes you a stronger person.

Just have a few days away from it until you find some inspiration. It's like having something embarrassing happen to you at school or work and your afraid to go because of it. But if you gather enough courage and hold your head high, then it will make you a stronger person and it will show people you don't care about your mistakes.

At least, that's what I think...