There’s something to be said for “friendly crews” and having fun with them but I’m betting that those relationships are only surface deep at the moment. You don’t have a relatable person or persons you call your BFF(S). And if you do, and they’re not a FA, they hear you but they don’t understand. Essentially, you’re lonely. That’s my read. I could be way off. But to me it sounds like you derive your energy from personal relationships and meeting a new crew for a 3-day trip and maybe never seeing that same crew a long time; rinse and repeat for a few years while you’re new still, and you have a lot of acquaintances but not enough friends.

Work on your relationships - understand that it might take a while because you’re only meeting people for a short while - look for people you can relate to and stay in touch with them. Remember: other new hires from your training class are probably feeling the same way.