i want to be happy

This probably isn’t a goal in its own right but more a result of achieving other goals in life. maybe more of a dream.

I’m not really sure if I’m depressed or just don’t have enough in my life to be happy about. Maybe I don’t appreciate what i have got enough.
I think I’ve felt this way for a while but have been burying my head in the sand trying to ignore it. It has just blown up in the lsat few months after a relationship with a girl. When I find my mind looking for things that make me happy and being with her is always the first thing that comes into my head, which then makes me feel depressed. When i try and justify feeling of depression and thinking that there are a lot of people out there worse than me i just seem to feel worse, like I’m whinging.