Having this debate with DD. She's 19, started uni last September and often has wobbles that she hasn't made enough friends, especially close ones (unlike other people apparently!).
To me, it seems like she has plenty and is doing great, often rattling off various names. I've reminded her that 6 months is no time to make really close friends. She has about 5 people at uni she describes as actual friends, everyone else is an acquaintance - two she already knew from home, plus 3 she's met since September. She counts them as friends because she socialises with them regularly (both individually and in groups) and messages & chats with them a lot, hanging out in each others flats etc. She also knows lots more people that she'll hang out with in a group, some are friends of friends, chats to them a bit on a superficial level but wouldn't meet up with individually. I agree that these are acquaintances. However, there are others she socialises with a lot as a group but doesn't actually meet 121, specifically two who regularly make up a 5 with her plus two of her "proper" friends as they're all into film so get together for movie nights and may hang out at the pub or someone's flat after, they also banter a lot on social media and message each other a bit but because they've never met up individually they are not friends (they are both close friends with one of her friends though). One in particular she mentions a lot but when I suggested they were a friend she scoffed and said they hardly knew each other!
I'm speaking to her later as she's been feeling very down about it all so would be good for some clarity.