Not again...

Ok so today wasn't bad but not so good, only b/c I am confused about this one guy...ok 2 guys..please help, I need your help to know what to do..I always see guy #1 looking at me in science, and than he and I have 3rd period together and he sits next to me, and I see him staring at me (or i think he is) and than he always laughs at me (not in a bad way) but he laughs at what I say to my other friends..than there is guy #2...he and I have 4th period together and he is always..ALWAYS looking at me..and whenever I look at him and we make eyecontact..he smiles at me with the cutest smile...ok so I want to know what you think about these two situations and what I should do...Maybe I can help you, ask me and I will help. Thank you and have a great rest of your day. =D