To break up?

Hi everyone. This situation may or may not sound stupid but I just need advice so please be kind.

Me and my husband met 4 years ago and we dated for about a month before he broke up with me. In that time he told me he loved me and took my virginity. After we broke up we kept im contact. He talked to other girls & I went on dates. He lied about talking to other girls but I was honest. Months pass and we end up getting engaged. During our engagement he was still flirting with other girls and in contact with an ex. I didn’t find out any of this until after we were married. There’s just no trust and I feel very betrayed. He lied about everything. Now we’ve been married 3 years with a 9 month baby. He has done everything to try to make it up to me. He wanted to go to therapy & has really tried to be the best husband & father. I can see he has changed. I know all of that will always be in the back of my mind and it really ruins my happiness and our relationship took a big hit since there is no trust. Would it be better for us to break up? I think I’m wanting a trust that is no longer there.