right now the only way i can "see" my yf is thru the internets. it's a purely long distance relationship.

when im 'with' him everything is fine.

when im not with him (which is a most of the time obviously) my mind starts to wander. the longer i dont see him, the more it wanders. usually i start to think things wont work out, he'll get bored of me, etc. etc. Always negative. basically i slowly get dominated by my fears of losing him one way or another.

is there a reason this is happening? should i actually be worried? how do i cope with these feelings so it doesnt negatively affect my interactions with him?

thanks