How to drink without fucking up your gut?

I'm not a daily drinker. I'm a compulsive drinker. Like Friday and Saturday combined, I drink 750ml of seagrams whiskey. Weekdays, I work seriously. So now I'm getting diarrhea everytime I drink. My intestines make huge noises and it sucks. It goes away in a day but I'm not able to enjoy my weekends properly. I take imodium when happens. Why is this happening to me? How the fuck do people manage to drink daily without having health issues. Im sorry for the rant but it sucks man. Im not abusing it so much but I don't get to process my emotions when I need to because of these shits. I had a fight with my girl and can't drink because of this diarrhea. Please help.