Me and my ex

So me and me ex (j) dated my sophomore year in high high I am now a senior. We dated for about 3 weeks and I deeply feel I love with him and we broke up 😢! Couple months later We stopped talking for awhile cause I got a boyfriend and he got a girlfriend. After me n my boyfriends broke up him n his gf broke up around the same time and couple days later we meet up at the park and we smoked and had a make out sesh. I still loved him even after I had a different boyfriend for about 6 months. We hung out and we became very very good friends with Benifits. Till this day we are still friends but we often fuck. I still love him I jut don't know how to tell him