@Cosmic66
So the best advice I can give is to start slow, and have your OC have a crush on Aeos before they start dating.
At the start, you can have some romantic moments, like hand holding, a compliment here and there.
It can take as much time as you need of course, but just have the two of them have interactions.
You can start out as acquaintances, then become friends, then start crushing on the other, then start dating.
Those are all natural progressions in a relationship, so it would probably be best to have them follow the natural order of things.
Let me know if this helps or if you have any other questions.