Young Love and Distance Relationships

I am 16 and I had a semi long distance relationship with a girl for 4-5 months. 
I am bi (but still discovering myself). We didn't see each other much in person because she lived a hour away from me and my dad hates driving distances... But we talked online every minute of the day we could and Skyped a lot too! 
The only reason I ended it was because I was in such a bad place I didn't want her to have to deal with my problems. 
We have been talking a lot and I still like her... A lot of people say don't get back with your ex that's crazy. 
She was my first relationship so is it normal to not lose feelings for them?
I kinda want to get back together with her but when we dated before she didn't tell her parents and I felt like I was sneaking around... And I want to see her. 
How could I make it work? 
What is your experience with getting back with an ex?
How did you make a long distance relationship work??