I feel like sometimes I pull back a little when things go a little too well with my crush?

Like idk what I'm doing cuz obv I like my crush and I want things to work out. But like sometimes when things are going pretty well I pull back a little and do things like pretend I don't see them along the hallway or not text them as much as usual, and I don't understand what I'm doing. Idk, am I scared of a relationship deep down? I imagine one all the time though. But I also know that I'm comfortable with the way things are now, even though I do want more, like what's happening right now isn't too bad either.
I just don't understand myself.