You have to be receptive to the way people change, and be open to the fact that some people may surprise you (in good or bad ways). Comfort is great, but in your late teens and early twenties, do you really want to lose all sense of romance?
You cannot control other people, and you should never strive to. It is important to spend some time alone, focusing only on yourself. And you shouldn’t bring it up in the relationship every chance you get.
There is never a reason to try and make someone jealous; if you feel the need to play games, then maybe your relationship isn’t working out. Be careful about letting friendships develop into more.
We're not talking about a good, healthy buzz -- because let's face it, that's the most likely time sex is going to happen for you this year -- no, we're talking completely sloshed. Sleep with someone because you are attracted to them and would like to have sex now, but only if you can do so without any expectations of a future relationship.
Because in close-knit community living like that there are no boundaries: people will walk in on you while you're doing it.
(Think Sam and Ronnie from .) Regardless of how they feel about each other at the time, the underlying problems are always there, waiting to cause another scene.