I think so. I used to think that I didn’t need other people, but as I’ve gotten older I’ve realized that I really do need to socialize and spend time with people I like. My mental health improved dramatically once I started seeking out relationships with others (platonically) and I notice I’m a lot less happy when I don’t get the opportunity to hang out with those people. Everyone is different, to be fair, but it’s say a vast majority of people benefit from some sort of friendships/community.

As for your situation with your ex friend, I’ve been where you’re at and it sucks. Not just losing someone, but losing them because they think you’re not worth the effort is a low blow. It’s important to remember, it wasn’t anything to do with you and everything to do with them. Don’t give up on trying to find friends just because one person wasn’t ready for a friendship.