I guess what it it boils down to is what they meant to you before you were married. That phone rings both ways. So if these people were not speaking with you (nor you to them) then perhaps that moment with your marriage placed all parties on different paths in life and everyone (including you) moved on. I don't see a villain here because no one calling is pretty much a silent consensus. Life has a way of doing that without any ill will intended. But through that assessment, you do have 20/20 vision on the past now, so you can determine if those are friendships worth renewing or if it never was much of one to start. But again time on the shelf is itself just a part of life. Friendships start for a variety of reasons and come in various levels of trust or connection depending on how you met them and why. So I would measure each one according to those parameters.