Is it normal that i feel this way about these people?

I'm 18 and female, ever since I was younger I've always found it comforting to have someone to look up to, as a role model sort of thing but not in my family, mainly teachers, and my boss. When I was little it started with my teachers in infants and juniors and I used to be a pupil that all the teachers liked and I got attached to them, then when I left my schools I got upset and lost contact with all of them, but when I went to high school as I went from year to year I had different teachers that I had feelings for, I used to get on with everyone but certain teachers stood out and I'd have a really good relationship with them but now more than ever I have a boss and she's really lovely, we spend a lot of time together, I really care about her, and I love how she cares for me too, even though I'm 18 she tends to look out for me and look after me, and also I have a teacher at college who I really like, we get along well and she helps me with everything whether it being work or personal issues, I find it really nice to have people like this in my life that cares for me, but I think of them in a different kind of way I always want to hug them and be as close to them as possible all of them time, and I get really excited to see them, I'd imagine sitting together cuddling each other and stuff but if I ever think of them in a sexual type of way it makes me feel sick, so I'm not lesbian but why do I think of them in that kind of way? Is it normal?