Heartbrokenly in love

Im so upset. I know what the problem is. Its my relationship. I love him I do. He does love me as well. But it makes me so upset. I dont trust him at all. He has showed me reasons not to but those reason were in the beginning of our relationship. I just cant seem to trust him. I think the best thing to do for myself now is to end things. But im so scared. Of my mental health and how it will react. idk what to do. Because i know it will be so hard for me to move on.