Relationship

I was with my ex boyfriend for eight months, I’ve never heard of him for like one month after this all month gone I just text me that he had some kind of personal issues, during this month never heard of him not even a text or called i went out with a guy and I slept with him, my ex boyfriend just found out I’m the one who told him that I slept with another man behind his back, we were argued today and I told me that everything’s over, I Love him what can I do?😭😭😭 I didn’t meant to cheated on him I do it because I was lonely! He just blocked me everywhere! Can someone give me some advice please?