Yeah, they've been friends since they were teens. Robin, Speedy, and Kid Flash had the same kind of dynamic that Robin, Superboy, and Impulse had, where Robin was Robin, Roy was like Superboy (Horndog, brash, recklace) and Kid Flash was like Impulse (Though less impulsive).
I dont know if they would have been lovers or not. Maybe a few awkward and rushed make out or groping sessions. Roy spent the age of 15 and 16 on heroin, and he didnt see Dick enough for Dick to see the signs because he had no way of getting to Titans meetings. I have him as having been over seas for a while now, so he prob hasnt seen Dick in a few years.