I Like This Boy?? And Im Not Sure If He Likes Me Back?

Okay so i like this guy and his name is Ivan but he already has a girlfriend and in cl because he sits in front of me and we are facing each other so he was just writing and i was just smiling at him and then my friend was looking at me like omg u totally like him. and i was like omg i didnt even know i was smiling at him. he's soooo cute. and it just makes me jealous when he smiles at his girlfriend in cl cuz she sits next to me. and his girlfriend flirts with this other guy and i dont want to tell ivan because i dont want him to get hurt. but im not sure if he likes me he smiles at me a lot and in my other cl i turn around and hes just staring at me and smiling and i smile back. i liked him for like 3 years and ive never stoped liking him. but i think he knows that i like him because its so obvious but i just cant help smiling at him. he just makes me smile everytime i look at him. and like in january he told his friend to tell me that if he wants to go out with him and then he said hes not sure if he wanted to after. i mean like he smiles at me in cl and i smile. i try to talk to me and ill laugh at what he says and then i say something funny back and then he laughs and we talk a lot in cl thats why we get introuble by the teacher but do u think he still likes me?