Although Frosty is a bit distant from others, any pony that shoulders their way into his life will more than likely be deemed a friend, unless Frost meets them on bad circumstances (aka a fight, etc.). Frost is a very likeable pony once you get to know him and reach behind the walls he puts up. In all honesty, there's nothing he'd like more than to have a companion by his side!
Unfortunately, its due to the same distant nature that prevents him from making many friends that ultimately gives Frost enemies. They are few in number and often forgot about, mostly old bullies from his childhood, but one can still end up on Frost's bad side... generally if they're harming others in any way, shape or form. Frost has a low tolerance for suffering, be it himself or others, and will put his hoof down when necessary.
A bit strange, but viable. Frost is a bit of a romantic at heart, even if he denies it; it is often that he catches himself daydreaming about couples, cuddling, and all the other small wonders a special somepony could bring him. Obviously finding a mate isn't in the forefront of his mind, and Frost would probably be too shy to approach a mare or stallion with romantic intentions, but who knows?
The Fun Has Been Doubled! is a My Little Pony: Friendship is Magic moderate-to-advanced forum roleplay. Set after the events of the fifth season, we currently have no overarching plot. Instead, we simply have created the world of Equestria for you as a giant playground to have fun in and to explore the magic of friendship. Canon characters and original characters are available for you to play as, both ponies and non-pony species alike! Just remember that we are account-per-character and we'll be fine!
So why don't you stay for a while, look around, and let us know if we should get a welcome party started for you.