Feeling lonely over the summer ☹️

I commute to my university everyday and last semester I did make some friends/acquaintances. I felt like we did get along and even planned stuff we’d do together this summer. I’ve tried to make plans with one girl for six flags or a movie but they just never happen so I stopped texting her and trying to put something together 😕 she hasn’t texted me in awhile too and I just feel disconnected from the people I met. It’s more annoying when the person doesn’t even text back especially when the convo ended with me asking a question like wth. I also have a recent break up and I’ve been trying to keep my mind off it with girlfriends but it never happens. What should I do, should I at least text someone right now to spark up a convo again or just leave it at that?

I’m definitely gonna be more involved in the fall and join a few clubs. Idk I just want some good people I can talk to and hang out with.