I dont know whats happening

Me and my partner went to italy for a little getaway and we had the upmost amazing time. It was like there was only two of us in this world. But on the last few days he started acting weird being distant and not showing any love. We come back from our holiday and i don’t know what happened he switched. Every little thing that i do seems to ager him he says that i have attitude and i disrespected him while we were on holiday and now. I know i have small suddens of outburst of attitude but its not something that happens often just a change feeling in a quick moment but when i realise i did it i apologise for what i had done. But now he has become rude and a-lot of aggressive talking and plain up mean. He is the sweetest man I’ve met but i don’t know what had changed.