So in the vein of no stupid questions I’m going to ask you a stupid question. It sounds like you didn’t particularly value the relationships you used to have with your “friends in law”. Do you actually want to meet people to build friendships with, or do you feel socially pressured to do so? I’m here to remind you that you’re not required. A preference for solitude is perfectly fine.
Maybe you don’t have that preference in which case others have written up some good advice, but don’t feel guilt. Maybe getting to know yourself for a while is a good thing. It’ll make any attempts at bonding with others in the future easier and more rewarding.