You already know this guy is bad news for you. He steals cars and also seems to know how to steal your heart. You can’t change him. At only 21, he is already a con man. There is no hope for this relationship.
There is hope for you, though. You already know that you are terribly insecure in relationships. You already know that you make unreasonable demands for reassurance. It’s long past time for you to get some help with this. I think the healthy part of you that knows that is what motivated you to write to us here at PsychCentral.
Please listen to your wiser self and get the help you need. You are only 30. Start going to therapy so you can become less dependent and so you can learn how to find the mutually loving, supportive relationship you deserve.
I wish you well.