Why won't he txt bak?

My boyfriend won't txt bak or say tht he loves meh anymore and on thiz thing on fb it says fb loves and my bff iz first wat do i dnt get into a fight wit him in a while nd we had thiz really deep covo lke 2dayz before he stop txting iz he madd at meh or wats hiz deal I kno he haz hiz phone he just got a new one do I break up wit him or wat we told eachother tht we love em we even planned on getting married plz help ASAP!