The problem is not that he wants to totally breakup for sure. He keeps changing his mind as to whether to be together or to breakup. I told him that I won’t breakup but he says that he won’t breakup either and we can carry on this way for two years till we get married to other people. Then at other times he says that I don't know true love and he'll marry me. It is like he swings between “I love you,I can’t leave you, I want to marry you” and “I cannot be with you. You are an ***hole, a slut, a *****. You are second-hand and worth nothing. No use marrying you”.

He doubts me even if I am away for a few minutes and so I have to be with him in person/text/call him.

I want some suggestions on how to rebuild his trust in me and to make things smoother. I know it will take a long time and immediate results are not possible. But if it stays like this without changing, it will make us both mad and suicidal.