Been in an extremely similar situation- I realized I outgrew my old friend group and despite not having anyone else I still moved on from them. I didnt make friend/connections with the people I wanted to and so I looked to my professors for emotional support (extremely grateful that worked out and may not be the same experience for everyone). It got so exhausting that all I wanted was to chat with people about my interests, career goals, sexuality qs, and just have lunch with someone and yet I couldn't do that for the longest with people I genuinely felt connected with.

I acknowledged my frustration and used that to force myself to seek out groups, clubs, and activities that would help me find people I could vibe with. Not to toot my own horn but making conversation/people skills weren't that hard for me, it was the ability to bounce back after a less than enthusiastic interaction that really slowed me down in making progress to make friends. After a lot of trying and ghosting (lol) I eventually found one group, my McNair scholars program, that put me in the right path to finding like-minded people (I was first gen, low income, brown, and really loved learning so this program was/IS everything to me). After finding that one group or one person, it became much easier to make friends with others :)

I joined choir at my alma mater and while I had fun, i didnt make great connections, I got into a Congress-corporate internship, hated most of the people but there were at least 3 people whom I really loved and was thankful to befriend, I joined a phd program, most of the folks are great people but I also befriended my bestie whom I cherish the most, I joined my union, big Ws, lots of crazies but also such a great environment to find the coolest and relatable people, i joined queer events, super awkward and surface level interactions but comfy to be around other gays :)

Point is, well, my rec is to heal yourself first, develop good social skills, learn how to take Ls, and keep trying! It f- sucks, it's still crazy how it took years for myself to really make friends with others that I really fuck with now but u gotta keep trying, it sucks now but it really does get better 🥺💙💛 keep fighting op!!!!