Guilty?

So I went to text my friend off my boyfriends phone and went to his emojis and they’re ALL sexual. His recently used are alllll sexual emojis. He never uses emojis with me or anyone in his text messages!!!! This is weird right? So from there I got major anxiety and just checked some other shit out like wtf and I seen that he has been deleting his search history.

Well I very very calmly approached my boyfriend about it and he instantly got mad and defensive and started calling me annoying and is now giving me the silent treatment. He swore on our daughters life he isn’t doing anything behind my back or disrespectful to our relationship. Also He called me annoying and said he doesn’t care about how I’m feeling about this. Now turned over and completely ignoring me.

Can someone give me some advice? I feel like he is just acting way guilty instead of just being calm and like yo whatever here’s the explanation and bam.... like I don’t understand why he’s being so mean and defensive