What should I do?

There’s this guy I like and I told him I like him and he said he felt the same way. I decided to start flirting it up since we had the same feelings but now he acts weird when I message him. I want to move forward in this relationship but I don’t know how to. Please help

UPDATE: I told him that I wanted to move forward in our relationship and he agreed so now we are figuring out ways to move forward!!

UPDATE #2: we are moving on with our relationship and it’s getting pretty serious❤️