Can my school suspend me for this?

[alli12XD]

I am a 15 year old who goes to a private school. My friend got suspended today atschool for skipping class with her friend to go to the bathroom and take pics. I was not involved in this but they both told me that I would probably get suspended from school too cause the guidance counselor, the one who suspended them, said that she's gonna question me tomorrow and will probably suspend me cause she found a pic of me and my friend on facebook of us in the bathroom and it was taken a couple months ago. It wasn't inappropriate, just a normal nice pic of us smiling and it was taken before first period where we have 15 minutes of free time. Can they suspend me for this? Like am I the only one who finds this ridiculous??