So I (25-Year-Old Male) was on a Contiki tour in Spain. It was supposed to be for 3 weeks but I cut it short about 5 days in. I was really looking forward to this vacation, mostly because it would be a break from my job and reduce my stress. But it was my first Contiki and I didn't expect it to be so busy. Bouncing around different places with little to no rest. The only time I time i could relax was either on the bus or asleep at a hotel. Also, since this was a young crowd, we went on a few drinking benders and clubbing. I'm not a drinker, nothing really against it I just don't do it. So this was my first drink of alcohol, let alone a bender, in about a year in a half. The first one was fine, Europe tends to double the amount we usually get in Australia so I was pretty quick with my limit. The second bender however, made me depressed and stressed, I drank a full litre of Tequila sunrise because everybody else was doing it and it made me miserable that night. I went back to the hotel sad and scared. Knowing that there were more to come (especially a huge club night in Ibiza, that would’ve ruined me). So I decided to make a tough choice to leave the tour early and head back home. It wasn’t the fault of anyone there, the group were genuinely lovely people, I just couldn’t keep up with their lifestyle and felt it was better for my mental health to head back. But it's been a few days and I growing more uncertain and regretful of my decision. I've been getting lovely messages from the people from the tour and it's making my decision harder and harder to justify. I genuinely bonded with these people and I miss them so much. They say they understand my decision but I'm not even sure I understand myself. Was this just a knee jerk reaction? Could I have handled this differently? Was this a good decision in the end? I miss them quite a lot and I’m very conflicted on how I handled it. Any advice is warranted please.