Temporary LDR is not what it was previously

I (F19) have been dating my boyfriend (M19) for almost 1.5 years. We both live in different states but go to the same college. Our relationship started my senior year and we were long distance for a little over 6 months. This is both of our first relationships. We went to school together and had a great time. We hung out a lot, went on dates, and I really loved this kid. However, since going home for the summer, I feel like things changed. Last time we were long distance it was tough but we made it through it no issues. For some reason this time around is immensely different. My bf has been upsetting me a lot because I feel like he's not putting any effort into us. I'm always the one having to figure out when he's available to call (I have a flexible work schedule so I'm usually able to work around him), but he hasn't once asked when/if I can talk. He claims he's working on himself this summer and I'm not his primary focus when I've called him out on this behavior. It seems like he just doesn't care. He claims he still loves me, but his actions make it seem like the opposite. Were only apart for another month, and I'm sure things would improve a lot once we're in person, but I'm not sure if I should put up with this another month because it honestly really puts me down sometimes. I don't know how else to approach this because I've mentioned it a couple of times that I'm the only one setting up calls, trying to act like were dating etc. Should I continue putting in effort? Or is there a different way to approach discussing my feelings about this with him? Or should I just wait it out and just have a long sit down talk when we're back on campus? On one hand I feel like I deserve better than how I'm currently being treated, but on the other hand I have a really connection with this kid and really clicked before this summer.

Sidenote: when we talked about going long distance I told him I wasn't expecting him to call me every single day because I know we have busy schedules. However I feel like talking for half an hour 1-2x per week is not asking a whole lot. However that hasn't been happening and the only communicating we've really been doing is snapchat with the exceptions of the calls I've been setting up a little less than once per week. Also neither of us have visited each other this summer as we're both working I guess