Is it okay to kiss my boyfriend before school starts when no one is around?

I hate PDA, and I would never kiss my bf in front of people... But he kissed me 2 weeks ago when we were alone (my first kiss) and we haven't had any time Alone since because I've been too busy with band, church, and orchestra. Is it okay to kiss in the hallways when no one is around to see it? Not like making out (I'm too religious anyway)... Just a kiss....