feeling depressed and sad

i been with my boyfriend for 2 years and 7 months. things are going pretty shitty lately . he's been changing and not really thinking i'm sexy , i feel very ugly and down.. he's not caring anymore about me . he's texting other girls , well they text him first . he's 26 and i'm 22 and mature then him. i don't know why he's doing this to me when i have depression and anxiety .. we always argue a lot about dumb shit and he never brings up the future with me .. we used to talk about it when we were dating in our couple months to a year but now he doesn't anymore ... idk what to do anymore just killl myself ? 😰i don't want to take the easy way out but i always think. about it all the time ...