This guy is single and responds to my snapchats quickly and starts conversation and everything

But he also has friends who are really really pretty and sometimes he doesn’t reply fast but is seen on snapchat

And why would he choose me over those girls they’re so pretty and funny

And I feel like I need to get over him because it’s unhealthy always second guessing myself but I don’t want to cut this guy out of my life just in case there’s something there?