How to date

First time after a long time and idk what to do now lol how do you know he’s the one.? Do I go on a date with the same guy everytime or do I see him everyday.? I’m lowkey scared I just don’t wanna get cheated on again n go through the same. I also have a daughter I don’t plan on bringing her around anyone until i know we’re super serious and it’s been a while together. Thx for any tips. I’m 20 btw