Phone wallpaper...

How would you feel if your SO refused to put his phone wallpaper as a pic of you or his kids or even a family pic? I’ve asked my husband several times why he can’t/won’t do it and he always says it’s because he can’t find any good ones. Yet, I constantly send him pics of myself, our kids and we just recently had family pics done. He just got a new phone after his got lost so I can understand him not having the old pics of us but since I’ve been sending him the new ones why can’t he just use that? He’s been untrustworthy in the past and we’ve been really struggling lately as a couple so this is just more fuel to the fire. Our sex life has decreased, he has started taking care of himself more, and acts like I annoy the shit out of him every time I talk. In my opinion those are all 🚩 for a cheater! I don’t mess around with that so I’ve asked him countless times if he’s cheating and he says no. I’ve snooped 🤷🏻‍♀️ and found nothing, I’ve told him how it all makes me feel and then he’ll just say “all you do is complain and fight” “it’s like fighting is a sport to you” Last time I checked when you’re married you tell each other how you feel, you work on things as a couple, and you don’t make the other one feel isolated or alone. I wouldn’t have gotten married knowing I’d be in it alone 😒 Not having any solid proof of him cheating I feel like I’m just fucking crazy. I wanna make things work because of love him but I’m losing my mind trying to make him care.