I have a crush on a guy but im not ready

Okay dont judge me dont slime me or anything

So, i have a friend, we've been friends for like a year almost, we go to the same school and stuff, he's kind and nice and im pretty sure we have mutual feelings for eachother 

The thing is im js not ready for anything, im not ready to be in a relationship, or im js not interested in being in one

And idk how to react when he confesses what should i do??