it cant be all coincidence ?

[K]

That's pretty confusing. I feel like the guy friend is just being nosy, trying to see if you post about your crush or not. Maybe he likes her too and feels like you're his competition since you like her. All I can say is talk to her normally, as if nothing is wrong. Don't push your feelings onto her, as she already knows them. Just wait to see if she comes around and makes a move.