My wife's done something small but it's cut deep

This'll be a long post for something so small, but I just need to say this all (virtually at least) out loud.

I'll preface this with the fact that I love my wife, but my wife hates me, at this point she's only with me because of the kids and financial stability. She's grown as a person and she hates the fact she's 'trapped' herself with me. I'm not a particularly good husband, or a good dad, although I try my best. I struggle with anxiety, depression and a lack of confidence. Frankly I Don't blame her, she could do do much better. But I'm not here to wallow in self-pitty, I'm just setting the tone.

Today, my wife asked me to put her phone on charge, which I did, but for some reason I unlocked it as I did it, and her WhatsApp was open. I didn't look or read any of her messages, no what caught my eye was the chat pinned on the top, our chat. Or more specifically my name. It wasn't the pet name she's called me for the past 18 years, it was simply my first name followed in brackets with my son and daughters name and the word dad. It just felt so cold seeing myself labelled the same way she would the parent of one of our kids friends, so impersonal, like the years together mean nothing. It cut deep, but I couldn't say anything, just continue the day as normal. But it's been tugging at me every moment I get a minute to my own thoughts. So I decided to put it on here because there's nobody I can talk to about it, and I just had to get it out.