Advice

I’m 21F. There’s this boy in my uni class. We take the same courses together. We’ve had classes together for over a year now. This boy has never noticed me before, never gave me a compliment and only speaks to me when it’s absolutely necessary. Fast forward to second semester of our second year. On this particular day, said boy approaches me and tells me I look different and pretty. I asked why and he said:”you don’t normally dress this way”. I laughed and ignored him. Few days later we are standing in front of our lab and he hugs me from behind asking me how I am and requests for a photo together.
Since then he always hugs me from behind and tries to make small talk.
Do you guys think he is into me or what?
What should I do? I’m confused