how do I make friends or be a better friend

Note: Okay I know this sounds really sad but. I get along great with a lot of people, but only in school. Which is the problem.

Yesterday I had a realization. I don't ever talk to my friends outside of school. Everyone else seems to be doing stuff all of the time, but I just.. Don't exist outside of school. I want to have fun with life! Go to my friends' house and have sleepovers and walk around town together. Idk if this is possible anymore due to the internet but. At least a year ago I was doing stuff like playing minecraft and roblox with my friends daily. Now it's just... Nothing?. I think the only two options left is to make new friends (which is hard since idk any cool people) or start inviting people to do things (worried that that'd be me somehow forcing them to be my friend but yk. Besides the person I consider a bff is sorta flakey so Idk if it'd even work). I want to know if anybody else is going/has gone through through a similar thing and if there's anything I can even do about it.