Boyfriend problem

I'm very confused with my boyfriend right now & I was wondering if anyone has advice on my situation. So me and my boyfriend were texting about how we were going to plan our weekend out & and everything for my birthday & at the time he was ay work & I was at home chilling & that was the end of the conversation & then the next morning wake up & got ready cause we were going shopping & I got no reply just nothing & in the same day I went to work came home to no text & the next day no text either & I ended up texting he saying if he was good & still I got no replies & this started on a Sunday & now its a Thursday & it was weird cause he was on snap posting happy videos & shit. It just bother me like you can’t text me back I was worried about you and I don’t know someone told me it may just be nothing I am just overreacting & maybe she’s right maybe he just want time for his self, but he could still say something. I’m just now not texting nothing & just waiting for a replies idk am I overreacting? Why are guys so confusing?