Im confused what is this guy doing?

This guy I've liked for a long time in school we only ever speak by text but now have stopped he doesn't text back anymore he started again at christmas. We had never spoken face to face as he is n the year above me. I spoke to him a few weeks go and we spoke on the way to the lockers asking how each other were he was walking beside me looking in to my eyes smiling as we spoke. Then the next week same day I saw him he spoke to me this time and my friend was there and he was mostly talking to me and beside me again. about 2 weeks later I hadn't really seen him or spoken to him since schools been back. Today before break he was putting a chair back into a cl and I was walking with a group of friends I saw him near and said hiya to him and he said hey smiling back then he kinda went back quickly for something i think or moved back. Then I was walking down the corridor with my friends to the hall I then saw he was right behind me I could see him from the corner of my eye. I wasn't sure if he went back to not talk to me or was just a bit shy to talk with my friends in front. Hes a quiet type of guy.