No, Crowfeather is not a loner. He is a warrior cat from ThunderClan in the Warriors series by Erin Hunter. Crowfeather is a prominent character in the series and plays significant roles in various story arcs.
Purdy doesn't necessarily dislike Crowfeather. Crowfeather is a very young and arrogant cat when Purdy first meets him. Crowfeather insults and questions everything Purdy does which irritated Purdy.
Yes, the Burmese cat breed is closely related to the Burmilla cat breed.
No. No other cats loved Leafpool, because she is a medicine cat, and a medicine cat cannot love another cat, cannot be loved by a cat, and is not allowed to mate. Unfortunately, Leafpool accidentaly gave birth to Crowfeather's kits, Lionkit, Jaykit, and Hollykit.
Feathertail saw past his arrogance and difficulty, and saw something she loved. Crowfeather could be a gentle and sweet cat when he loved something.
[SPOILER ALERT] Crowfeather has kits with Leafpool and his WindClan mate, so obviously he does.
Yes, the Ragdoll cat breed is a very large cat breed.
No, the American Shorthair cat breed isn't closely related to the American Bobtail cat breed.
Yes, the American Curl cat breed is closely related to the American Bobtail cat breed.
A white cat can be of any breed. It is simply a white cat.
Yes, Crowfeather is the father of Jayfeather, Hollyleaf, and Lionblaze. They are from a litter of kits he had with Leafpool, a ThunderClan medicine cat. Their parentage is a significant plot point in the Warrior Cats series.
Yes, the Singapura is a breed of cat. The cat is one of the smallest breed of cat.