Hes embarassed of me, is he cheating?

I met my bf when i started working at a company, when we were working together, he used to would always blow kisses in front of everyone to me, whenever he passes by. He would piggyback ride me, and put his hands on my thighs. Fast forward to 2 yrs now, he started a new job about almost a year ago. He told me his workplace, all the shifts are working together for this thanksgiving week. Hed call me on his break in his car, constantly look around, and whenever its time for him to go in, he would look around him, cover his side face to cover his kiss. He didnt want anyone to see him kissing me thru the phone. On all of his breaks, he doesnt do this. Not until he started working with all 3 shifts. I ask him why hes embarassed about it, and he said one of his guy coworker is staring at him. I have a feeling, maybe hes trying to cover himself cause he doesnt want one of the ladies to see him. What do u think? He would message me a kiss emoji and said he will see me later, but i dont respond to them.