1) You need to be more specific in your request. There are multiple types of love spells. And if you do a bit of searching here I'm sure you can find one for whatever your purpose it.
2) As for online spell casters, don't waste your time or money. Its always best to do things yourself and most of them don't even practice anything, they just pretend. Study and learn, then do things yourself.
Well my friend, why don't you go to that person and propose her rather than cast a spell and wait for it to happen? Also love spell will alter that person's free will and the law of karma may come for you anytime.
A word of advice-"Think before you act."