Agree with what some others have said about finding the right setting and doing things that interest you. If you’re staying in hostels I have two main suggestions. 1. look for the alternative healthy lifestyle ones. Suggest doing some yoga, wellness, or surfing retreats if you’re interested. 2. Also, getting out of the cities. Small towns don’t attract as much party people. I like going to mountain towns with good nature and hiking. I made friends at hostels just by asking if they wanna go on a hike or going solo and meeting people along the hike. Also suggest doing guided tours for things you’re interested in. Birdwatching tours are really nice and start at 6 am (not the hard drinking crew).