Go for it, you are both older and wiser now. At least you will be able to move on if she rebuffs you but you may find she has been thinking positively about you too.
Many years ago there were silly arguments among a group of my friends and, as happens, sides were taken and the group drifted and went separate ways. I never really felt like I'd fallen out with anyone just that we were finding our feet and confidence in different areas and needed to grow in that way. Well I did think about the girls I didn't see and knew I would make contact at sometime, certainly with one of my best friends from that time, I just needed to get round to it. Well one Christmas I received a card from her with a note in. I did laugh! The old camaraderie, humour and funny stories were there immediately. The card was from her and her then 10 year old daughter who I knew about but had never met.
We are now more than 15 years down the line past that card, still give Christmas cards & presents, birthdays cards and presents and am proud to say she is still one of my best friends and we meet up regularly. I also see the other girls now too and there is not an ounce of animosity among any of us.
Here's to friendship 