AY, I find I've become more discriminating about friends with age. It's true for me that I'm more tolerant in the face of casual company, but at the same time, I'm more content keeping my own company and have no desire for drama as the price to pay for friendship. My old friends seem to feel the same way. It's an odd dichotomy of being more open to relationships, but equally content to cut bait and run rather than pursue unsatisfying company.

FWIW, ruh roh, I've generally found in my life that when I've felt most settled in myself is when relationship options come out of the woodwork. As though it's like pheromones! Maybe this is what your T is trying to express--not to settle for aloneness forever.