First proper (LT) GF... We both have personal issues. How to proceed?

Hey fellas,

I'm a 17 Y/O Fapstronaut with exams in less than 50 days. My GF is 15 Y/O, and who turns 16 Y/O four days after I turn 18. We met on a teen meetup app, essentially the replacement Tinder for those under 18 nowadays.

The last five months we have been dating have been incredible. Tonnes of new memories, getting closer and being intimate (no sex yet, wanting to wait until her prom after her birthday when we get a hotel room and make it memorable). We both, as all do, have personal issues. I have wrestled with self-esteem issues most of my teenage life, which are much better now but still float to the surface every now and then. I have mild Autism, so being more emotional and sensitive is just part of my makeup. She is living with a family who she to put lightly does not get on the best with. Her parents are separated and all sorts.

She also has exams, sooner than I, and at the minute we are not seeing each other very much, Yesterday she stayed over. That was the first time we met in over four weeks. She also lives over an hour and a half away from me. Fair enough we both get public transport to meet half-way, and it's worth it in my eyes, she is worth it. I have some issues that I am wrestling with though:

• Since she is my first GF, I've had little experience with girls. My autism in my younger years was more of an influence, and I shaped the opinions of my schoolmates from then on all the way until today. Thankfully I am nearly out and going to university, but nevertheless the struggle with socialising and reading social cues etc. meant I was not exactly the guy any of the girls wanted to go for. Insignificant in the face of many things I acknowledge, but being younger it's rankled me somewhat. Now I am 17, more mature, bulkier and more socially savvy (I can approach total strangers and open a conversation, including girls off the street) I'm beginning to be more attractive and have potential to be even better. Whilst I am very happy with my girlfriend, I feel like I've missed out on something and will continue to do so. Maybe it will rectify itself once we have had sex in our own time and that part of me is fulfilled.
• Having autism has made me more emotionally sensitive. I see my autism/Aspergers as a gift most of the world cannot truly understand, but it does make me more emotional and gives me a powerful imagination. She mentioned she was so unhappy at home she was considering suicide. I talked to her and another friend of hers talked her out of it, but my mind was quickly filled with all these awful mental movies and images of scenarios etc. I do not wish to repeat - but they made me sad as hell and I will admit I cried a little. I got mad and upset at her for considering that, and we ended up not talking for a day or so. Things are stressful as they are, but I cannot afford any more stress right now than is necessary.
• The distance - it's not absurdly far away, otherwise, we would not be dating. But it's far enough that after a few weeks of not seeing each other arguments tend to crop up. They are silly and a waste of energy, but they do.

Thanks for taking the time to read this lil' post. Gratias tibi!