I feel lost, alone but no therapist has helped

I am a loner, I'm married, have a child, grandchildren, come from a big family, but feel alone. I do not have anyone I can just vent to. No one to share my secrets to. I get anxiety when I even think about joining a group and if and when I do I stay to myself. People may think I'm stand offest or mean or whatever but I have a terrible time letting anyone in. Can't talk to my husband about it he gives me the impression that he thinks something is wrong with me. And just says ain't no one to blame but yourself, just go out and do it. I've gone to several therapists but just stop going because I didn't feel the connection with them either.