Firstly: You can't be mad at me for going out and having a good time just because you can't because you're not 21 quite yet. There have been many times when I've been left out and didn't pout because of it.
Secondly: I know you love your boyfriend, and that's great. I don't love him being here 75% of the time. I pay half the rent, I shouldn't have to feel like I can't use the apartment when he's over. And I know I can't say he needs to come over less often because you'll just pout. We picked each other to live together, you should want to hang out with me more often! Even just sometimes.
Lastly: I know you miss me, and I know it's because I'm the easiest child to deal with. But I moved 6 hours away for a reason, and I don't like feeling like I've disappointed you by deciding to stay away this summer. Your son did it every summer he was in college, so why can't I?
Sorry, I just really needed to get all that out.