Some people do recover. Sadly I'm not one of those. I'm 33 and still self harm, but a lot of people do recover and you could be one of those.
I wasn't offended by your question. I think it's understandable to wonder about the future. You say you don't want to be the same in your 30s, so perhaps that is motivation to work on recovery and get help. It can happen. Do you have any support or professional help?