No, because they had a big fight and they were always a bit prickly towards each other.
Jaypaw was born blind.
Willowpaw and Mothwing come to Thunderclan because if you don't know this yet Mothwing doesn't believe in Starclan so when Willowpaw had a dream from Starclan she had to get Leafpool to help her interpret it. -Moonshadow-
Jaypaw doesn't hate crowfeather he just doesn't like him.
She is the medicine cat apprentice of river clan in the power of three "the sight". :)
Crowfeather
it is confirmed that jaypaw and cinderpaw liked each other. it is confirmed because in book 2 of the omen of the stars series it hints that jayfeather and lionblaze are both in love with cinderheart.
Leafpool
Jaypaw gains his full name in Long Shadows on page 253. His name is now Jayfeather.
I'll use their "paw" names so I don't give you spoilers. Simply no. Jaypaw is a medicine cat and is forbidden too fall in love. There has been too much forbidden love that Warriors is starting to sound like soap opera JaypawxPoppypaw=nothing. Too wrap things up,no.
No he is a medicine cat
Crowfeather
Willowpaw, medicine cat apprentice of Riverclan under Mothwing, became a full medicine cat with the name of Willowshine. She still trains under Mothwing as a medicine cat and has a very minor role in the series to date. However there are hints of a romance between her and Jayfeather... :)