Bellamy - most guys in camp avoid you, because they know you're with Bellamy, but when they do talk to you, or touch you, or even look at you for too long, Bellamy gets really pissed and walks over to you while he gives him a death glare, and if he still won't stop, it usually leads to a fight
Finn- he's always out exploring, and he often doesn't even tell you he's leaving. He always worries that you'll cheat on him while he's out. He doesn't like when you hang out with your guy friends alone. Whenever he's in camp he is really clingy and he's always abusing people of checking you out.
Lincoln - Since he's a grounder, and you're a sky person, you don't get you see each other as much as you'd like. He thinks that one day you'll leave him for another sky person or that you'll grow away from him. He never shows that he's jealous, but on the inside it's raging.
A/N: I could only come up with 3. I'm so sorry :(
