a bit confused

I have times when I think I'm super super gay like I LOVE GIRLS and then at other times I'm more like :/ :/ do I actually like girls, is this a phase, am I just rebelling etc etc. I feel really bad about this because I don't want to lead a girl on and then realise that I no longer like girls and it was just a phase or something. I'm just super confused and I don't know how normal this is. I know for a fact I don't like guys, so I'm definitely not bi or anything- I guess I'm just worried, it's a really confusing thing to figure out.