You're only 16 and there should be a way stretch ahead of you...
If you find life meaningless, go search for that 'meaning' in your
life...? 
And then think about how are you gonna
work towards it...?
With regards with your 'gf thing'.... I think you don't necessarily
need a gf.... Maybe more friends could do the trick too...? Anyway,
it's really up to you to choose...? 