Search Results: good relationship with your boyfriend girlfriend

I'm a junior & I know this year is going to be stressful & tons of work. Last year, I fell for this guy in the popular crowd, but I'm pretty much over him now because we never really talked, we aren't in the same social group, & have no mutual friends. However, he was my first real crush & I've heard you never get over your first crush. I kind of feel like I need someone to fill the gap.
1) This year, there's a guy who's caught my eye & I'm pretty sure I've caught his eye too. We're in the same social group & I think we have some mutual friends. We've never talked or even been formally introduced, but my girl friend keeps encouraging me to talk to him. So, I think a relationship could actually be within reach if we put some effort into talking to each other.
2) There's also this senior in one of my classes who I think is cute. But after talking to a senior girl friend, I found out he hangs out with the wrong crowd so I decided not to have anything to do with him. I also learned he has a girlfriend. But last night we were both at an event (I was performing) & I looked up at the audience right into his eyes. He was staring at me kind of half-smiling & after we made eye contact I quickly looked away.
3) Very recently, I feel like I've caught the attention of a senior who was on the homecoming court (so he's popular). He's good-looking & seems like a sweet guy. We have one mutual friend who could introduce us, but I feel like this is a very similar situation as my crush last year. I don't want to get my hopes up that there could be some meaning to his glances, so I'm trying not to think about it.
I appreciate anyone who has read this far! If I had 1 phrase to describe each guy: 1 nerd, 2 smooth talker, 3 heart throb. I'm open to just becoming friends with (any of) these guys, too. Should I just focus on school & not worry about boyfriends? Go for the guy who's within reach? What do you make of the 2 senior guys & their frequent glances? Am I overthinking everything?

He has two classes with her and i accidentally heard his conversation with his friend at school. His friend said "I saw you eye fucking the new chick" and "dude I bet every time you look at her you're undressing her with your eyes". He said something like "she's hot. I was given the chance, id probably bone her even though I have a girlfriend haha" WTF!!! I DONT BELIEVE THIS! We have a good relationship and he just asked me to winter formal two days ago in the cutest way (he put 100 little balloons in my car and made me the cutest poster) why would he say he would most likely bone her if he had the chance?