How to save my relationship and the man i love.?

It was a shaky relationship in the begining it was a situation where i loved him &he didnt loveme back.But i continued to be there 4 him &eventually became best friends.He had commitment issues &alcholic. I had issues my self 2 that i havent delt wit it only when i go into depression because of what had happen to me when i was a young grl.4 the past 2 yrsWe became close &we became offically stable in our relationship because he told me he was in love with me and loved me. We still had our issues but we delt with them in different ways he would drink (hes not abusive,or angry when he drinks)hes an alcholic that becomes depressive. But hes a outgoing individual and it doesnt effect his work type. I just delt my issues thru anxiety&depression. Welive normal lives &do relationship things.But there was a turning point i cheated on him recently with a man i didnt know.i didnt have wit him or made out he was givingme a sensual mage.just touchin.Weve been together 8yrs on&off.I told him