<human>: A couple months back I met this amazing girl (we were both 15 at the time we're now both 16), I shall refer to her as Alex.
Alex and I started chatting and after she split up with her previous gf (she's bi) we ended up getting together. 

The months that followed were some of the happiest of my recent life. We became really comfortable around each other and told each other everything. We went out to places. Great times.

There were two issues though, two issues that my mind blew out of proportion:

 1. Her Dad, her dad (tbh) was the laziest person I've ever met, he lives on benefits and spends his life doing nothing of use. He then is a dick to everyone around him including Alex, and at sometimes me. So I ended up despising him though I didn't want to say anything as Alex really cared about him.

2. Her mood swings, one day she'd be over the moon but the next she'd crash and be really down. I'd do a lot to try and cheer her up sometimes with success but often to no avail. This often stressed me out. (Stress is one of those things I manage awfully).

So from these two issues my mind came to the conclusion that it'd never work and it'd be pointless to continue. At this point she really loved me so when I told her this it broke her heart. 

She ended up getting back on her feet and we have remained good friends. She ended up getting back with her ex and her father and his partner decided I was scum of the earth. As of late I can't help but think what a massive cock up I made. I still love her and really miss our relationship. 
I feel though that telling her would just wreck her. 
Any ideas/support you could give me would be greatly appreciated.

Give me the gist of the text in a nutshell
<bot>: I told this amazing girl that it could never be as I was blinded by petty things but I can't tell her that as I fear it would severely damage her.