How do I stop cheating on my boyfriend?

ok so me and my boyfriend have been together for about 4 years weve only brokn up one time for 7 months.. weve lived together the whole time except for the breakup.I’ve cheated on him SEVERAL times and I can actually be one of them girls that say " I know my man isnt cheating" because he doesnt hes 22 years older then me..and we have a great relationship except for my dumbasz. I’ve cheated on him with a few people I ALWAYS use protection though..one particular was his brother that lived with us.. I cheated with him for 2 years without gettin caught.. I didnt do it because I dont love my boyfriend I did it because he was an alcoholic and ALWAYS out at the club or past out drunk… and when I cheat I dont know if anyone can say this but I get an addrenaLin rush because I know im not suppose to and then when I get done I feel like crap and cant stop thinking about it.I havent messed with his brother in over a year ..I finally stopped it.it took a lot.. he still calls me tho knowin I told him im trying to change.but I havent given in.so we broke up last new years and got back together over the summer and sadly the 2nd day we were back together I cheated on him AGAIN with someone I had cheated on him before..I havent seen that guy since because I am trying to change… I do text him tho… I know I shouldnt be… I text a few guys.. girls too… but we just have fun convos never anything physical.now I been going away for 5 days every month to stay with my friends child in the hospital I’ve met 2 guys in that area and ended up cheating ONCE AGAIN with one of the guys.. same thing Addrenalin rush .. then guilt…when we broke up last yr I told him that I had a cheating problem and thats why I couldnt be with him and because of his alcoholism. when we got back together he stopd drinking..but why cant I stop cheating.. I love this man with everything in me but I seriously think im addicted to cheating…