has he been cheating on me ? why communication is important in a marriage...

    I noticed he didn't want to hold my hand much anymore didn't want to kiss me much anymore. 

Last night I was awake and I think I had changed my baby diaper... I really don't remember right now but I know it was around 12ish(am) and my still husband received a txt saying " Buenas noches que descanses!!! 😊". Which means ... Goodnight and sweet dreams.  And I didn't think of seeing the txt but I was just wondering who would txt him at this time..?.. all of a sudden I saw the txt and I noticed he had changed his password to his phone. Things went in mind thinking... has he been cheating on us ?  

I woke him up and asked who's ****** ? Why would she txt you at this time and that.  

Story short... he deleted the txt saying he didn't receive no txt from her. And saying she's a long time ago friend who liked me. 

I lost his trust.  We had always talked about if he or I cheat we would leave each other.  

I told him I wanted a divorce and to leave us 

First of all ... why would he have a long time ago Girl that liked him still on his contacts and texting that . Totally means they had been texting each other lately.