What do you think about my ex? Does he deserve a second chance?

I’m 25 and dated my ex for 4 years. He took me to nice restaurants, cute dates, and it was the best love I had ever felt. A while in to the relationship he went to NYC for travel. He brought me back this fancy fur coat since he wanted me to have something nobody around here had. My parents saw it and forbade me from dating him since he was nothing but a “rich city boy.” I agreed to see him behind their back because he didn’t want to give up on us and I promised I would tell them later. He stuck by me all these years with unconditional love. The girls at work wanted me to go out with this guy and I went on a date with him because I wanted to feel “free.” I don’t know how my BF found out but he confronted me. I lied to him and acted like I didn’t know what he was talking about until he gave me proof. I blocked him because I was in a corner. He waited for me all those years and I did this to him. He was devastated. He told the guy about us dating and even accepted my sisters friend request on Facebook he promised he wouldn’t do. The guy I went out with was a player, while my boyfriend was everything I ever dreamed of. Fast forward 4 months later. I hadn’t heard from him all this time until he showed up at my family’s house with a package that had a necklace in it, wanting to apologize for what he did that weekend because he was afraid he was losing me and he acted out of desperation. He had never acted that way before. My family still hates him. Why’d he do this? Is he psycho?