What should I do?

So me and my classmates graduated high school recently and we had the time of our lives on our senior trip. We're a class of 8 so we're like family! We all go to the same church and grew up together. All of us are either working, having college classes, or in church. I understand that. I am busy all of the time during the week but I always find time to text the group and say hi or something funny. One of my best friends was like we're out of high school now life's different (which it is) but she's been the main one talking about she don't care about anything anymore she's just worried about herself and mess😒🙄Bruh!! If we had real friendships I don't think they would fall apart so soon. She's using graduation as an excuse to slack on being an actual friend to people. We JUST graduated 3 months ago-give me a break! I don't know...I feel like I'm the only one trying to make our group function like it used to. I'm tired of it😔 I honestly feel like cutting everybody off and hanging by myself. I don't know.

I only fight for things I think are real...and it gets on my nerves that I feel like no one else cares😤...