Hi, if you want my honest opinion (and hopefully I am reading all you have written correctly), love spells done on others really don't work. I mean they work for a limited time, but its not the same as using magic to create a perfect loving relationship for yourself with the right person.
All people have free will (and to some degree) magical protection when an errosion of their free will is threatened. We all have spirits and look out for us, so don't waste your time on making someone like you, when you could be concentraiting on finding a girl who really likes you. I must also add you are 18, and this is a good an age as any to be fickle!
Write a list of all the attributes you desire in another and then write a list about all the things you could offer another person, then do your invocation for 7 nights starting on a Friday just after new moon, then forget about it. Go places, meet people and be yourself. Someone will present themselves to you.
Kind regards,
D.