sleepless ^.^

Tried it in my early 20s, my advice would be... don't do it or avoid it as much as possible. 9 out of 10 times, it will not work out. Maybe statistics have gotten better these days with the newer generation but in all honesty, it requires a lot of effort and perfect timing to make things work. If you do catch feelings online, the best mindset approach in my opinion would be to just think of it as becoming really good friends and be okay with that. The younger you are, the less likely it will work out.