Need help asap he's spoiling it...

I have a crush on this guy and he has a crush on me.

We're flatmates. At first, he started to lunch and dine with me, when he heard I was going downstairs he joined me. It didnt really bother me since I liked him.

But now, we're still not a couple but he keeps going with me EVERYWHERE now.

He manages to know what i'm going to do and comes with me...

I'm going to study at the library, oh what a coincidence he's here already.

Same for gym, buying food etc.

He's ruining everything!!😢 I hate that!! But I don't want to lose him but keep liking him.

Any advice please on how to make him understand he should stop that without offend him and make it awkward??😟😟