Learnt my (16NB) boyfriend (17M) was venting to my 12yr old sister among other things
I really feel bad but I genuinely feel like he doesn't actually care about me in any other way than "im his girlfriend." I'm nb and have that set as my pronouns online but don't like using it irl for various reasons.
We've been together since the start of the year but met last September. We go to school together and share a lot of classes so we talk a lot. It's my birthday soon and I said to all my friends something along the lines of "i honestly dont want any presents please make me something, even if its really shit" and later my friend sent me a screenshot of him saying "i know she doesnt actually want a shitty drawing so im going to buy her something, what does she like?". I'm not someone who tends to be indirect and if I want/like something I'll be super direct about it. He should know that my biggest interest is my own characters and having people like and make stuff with them is probably what I care more about then anything money could buy. I also feel bad when people buy me presents since I have no money most of the time so he knows I won't be able to reciprocate anything he buys me. I learn also he spent £40 on it.
When we first met I thought we had a lot in common but now I do genuinely just think he was doing it to get with me or something.
But that was all fine I suppose, until my sister (we're very close, shes 12) asked me to tell him to stop talking about his sex life and to stop venting to her. I was obviously weirded out, he does know her because I'll often talk to her before and after school and he'll join in. I told him to stop and he said "I did tell her some stuff but nothing recently".
My sister told me stuff like she thinks he might have a personality disorder or something meaning he obviously has told her quite a lot including stuff like "im scared to do it with (my name) i heard it can hurt".
How do I go about breaking up with him? We have exams so is it best to wait until after? Theyre right around my birthday and he's expecting to come to my party as well and now I feel bad he bought me a £40 gift too. I'm really bad at relationships and all this stuff please help :'(