"Absence makes the heart grow fonder"

In my case it does I am curently in a long distance relationship and not being able to see him makes me only want him more

Out of sight, out of mind...
At first you will probably miss that person but after a while of not seeing them its like whatever.

i agree. but it only works to a certain extent. absence of someone causes you to think about them and usually you fabricate idealize them in your mind thus making them seem more perfect. but after a certain point, the "time heals" saying kicks in, and the time seems to wash everything away and they're not on your mind as often.

Depends on your situation and how long you are apart-the longer you're apart the more you'll grow apart I think.

Sure, for a little while. Because you're thinking about how much you miss them and how you wish there were there. However, after a certain span of time, you stop thinking about them so often and your eyes wander.