How do I find peace when there's something wrong that you can't change? I have responsibility OCD. I'm 17 and I have a friend who's 15 and I just found out they're dating a 17 year old. Which I find really unsettling and creepy. And I know that whatever I do I can't convince him to dump their boyfriend.

im not sure how this fits into responsiblity ocd. Do you consider yourself responsible for them being together if they don’t end up breaking up? I dont see how a 2 year age gap is even remotely creepy especially between minors and its definitely not illegal but regardless, I find its easiest to find peace with knowing that youre only in control of so much. Try to look at the situation as realistically as possible.

I have that OCD too. I used to do anything to keep my drug addict boyfriend from going out and ending up dead. I really became someone I didn't like. Maybe there are some things you can do and things you can't do. You can't get them to break up, but you could get to know the boyfriend to see if you feel more comfortable about him, and you can be there for your friend to listen and raise the alarm with their parents or school if there are red flags like they're feeling pressured to do sexual things or take drugs. And then beyond doing those things that you can do as a good friend and responsible person, it's important to accept that you can't control other people. Loving someone means letting them make their own choices, even if they end up being mistakes. You might find the age gap personally unsettling but unless there is genuine cause for concern for their welfare, from something which is real and in reality rather than in your what-if fears, then it's best to let them get on with their relationship.