Is it normal that when i sit with friends on the bus, i want to kiss them?

I noticed this particular part of my overactive imagination some time this year over the course of several band trips. Thing is, our director had the boys and girls separated into two different buses, and I generally ended up sitting with either Madeline or Elizabeth. We have nothing else in common besides band and seating arrangements, and here's the issue. Every time I sit alone with another girl on the bus, especially at night with them, we'll be talking about something completely unrelated, and in the silence, I'll get this brief but very vivid, half-arousing daydream of kissing them that lasts for about three seconds.

As a note, I do find both Elizabeth and Madeline moderately attractive but have no desire to act upon these feelings, mainly because these offbeat daydreams make conversation, friendships, and bus rides in general strikingly awkward. I don't know if it's just what I'd like to call "single-syndrome" or a combination of subconscious desire and wishful thinking, but it just happens. Is this normal for a possibly pansexual girl?