Dude, you're 18. I'm over twice your age, and I know that at your age, I didn't have a clue about love. I knew what I thought was love, but it wasn't until I met my husband that I realized I was sadly mistaken. By the time I was 18 I'd been living away from my parents for a year and a half and had been supporting myself, had my own car, house, and all the rest of that jazz and had lived in various places around the UK and europe. I thought that I knew it all. In retrospect, I knew nothing, and I especially knew nothing about love.
I also think that you're trying too hard. You've asked what, 4 girls? 5? I've also learned from experience that if you try too hard to find it, it'll only hide itself even more.
Everyone is destined to have a great love in their life, Lucas. Yours will present itself to you eventually. You just have to be patient and aware. You'll know when the time is right.