Depression Trigger?

Alright, so im 16 and about 8 months ago my firt real boyfriend dumped me after taking my virginity. But that was another story, but basically it took me lke 6 months+ to get over this kid, and when i finally was, i met another boy, Grant. Grant is 18 and leaving for college in like 20 days but we really hit it off so we hang out a bunch although dont want to officially date so he can go to college and get drunk and be the normal man- he is inside. But anyway, recently he stopped texting me constantly which makes me nervous becasue he has a bunch oif other girls that he doesnt like and would text him constantly but wouldnt reply because he didnt like them as much as me. So anyway, ive been freaking out leading into a constant feeling of depression, worse then my one from before. Im so angry too, i dont know what to do, all i want to do is swim and cry. I feel so uncomfortable i want to die! i cant sit still, i cant eat