How to Let My Boyfriend Live His Life?

Hey! So I recently got involved in my first ~real~ relationship (long-distance; approx 5 hours drive apart). I am currently working a really busy full time job, and my boyfriend (one year younger) just graduated from college. While he's out going to Coachella, drinking with his friends, going to pride, even just going to the beach, I can't help but feel envious. I wish I were doing those things or that he would opt out of doing those things to hang out with me. I have to turn off my phone to avoid looking at his snapchat or reading his texts. I want to say this: he has done absolutely nothing wrong. This is a problem that is completely internal. I feel like I am acting out when I kind of give him the shoulder when he drinks with his friends or goes out instead of face times/talks to me. I know he feels bad when I get upset because of this stuff, but I just don't want to get upset about this stuff in the first place. He is allowed to live his life, and I have to accept that, I just don't really know how to stop feeling this way. I don't want to be THAT crazy boyfriend, but I'm afraid I'm heading down that path. Any advice?