If a guy ignores you but stares at you somedays and then other days he randomly teases you and speaks to you and flirts with you does he like you andf why do guys do thatno stupid answers ty?

The guy is probably very shy with very low opinion about himself and that makes him being afraid to contact you, but he still want to you to notice him, that's why he tease you. If you like him then it will be the best for you to contact him. Just talk with him and he will lose his fear after few Words. It would be the best that you talk with him on four eyes.