You wanna end your life just because of what...? 
If you think you could get very upset over things, don't think too
much... There're so many things which you still don't know what's
happening... Don't spectaculate too much, let alone to kill
yourself...
And like you've said, this is your 1st relationship.... I know it
might be hard for you to accept and understand at this point, but
don't be too narrow-minded... You can spend time with your sleeping
pills, might as well you try to find more time to communicate with
her...? How old are you btw...?