Telling your partner is hard, I told mine I think 3 weeks into dating. It's now four and a half years later. It could be a big relief for you, it is a big burden to carry around in secrecy. Also could be a good support for you. But I think you'll know when your ready to confide.
I was diagnosed at 17 and never went back in for treatment, total denial. 10 years later and much trauma later went back in and diagnosed again. I am still not medication compliant and as everyone one else has said, this is huge for your success. I agree 100% take medication as perscribed. I don't know why I fail at that.
Therapy is also such a huge help. There's so much info online too.
Your young and can have such a bright future. I have three kids and a pretty good life. It is just a challenge not a road block.
Good luck