It can be hard to come out of that isolation. Start with your safest connections, your family then work your way out as you start feeling more comfortable.
People are much kinder than you imagine (not all, but most). The fact that they are your friends means that they like you and most of all that you like them - so they must be good people right?
Reverse the situation, what if one of your girlfriends was in a messy relationship and kind of dropped out of all social things for a couple of years and then called you out of the blue today. Would you stop and listen to her and welcome her back in to the world or would you hold some resentment?
Personally I would be happy to hear from the person and know they had their freedom from the isolation. No need to spill all the beans in the first phone call - maybe a simple, that relationship was much worse than I talked about - would suffice. Then when you meet up for dinner or whatever you can have a discussion.
So, perhaps don't think so negatively about your friends and family, they care about you.