I can't stop picking at things and it's very annoying?

It tends to not matter what it is. If I see paint chipping, i have to chip it all off. If I have a scab, I rip it off before it can heal. Fuzzies or loose hair on my clothing or on anyone else's bothers me. My boyfriend gets irritated because I will pester him until he has no more sleep in his eyes, no zits, no whatever. I don't like to see dust on tables or tv's, etc. I know it isn't a big deal, I should just let stupid little things like that go, but I can't. The picking at sores is what bothers me the most. After I've mutilated it and caused myself pain I think, if you would have just let it alone and healed, it would be gone by now. But I can't ever get myself to do that. Is there any tricks i might be able to try?