Very depressed about a friend ?

So my best friend who I tell everything too . Who I trust . Is in a really bad mood for some reason and he wont text back nothing or talk to me . Usually we talk like almost everyday were both dudes lol. It could be cause he's fighting with his gf . But Im worried Its somehow my fought hes my best friend I don't know what I would do with out him . I'm worried that now we wont talk or hangout i don't know what to do it's really starting to piss me off I don't know why hes in such a bad mood he won't talk to anyone . It could also be he got in trouble for his grades but he won't answer my texts or nothing it's been like this for like 5 days lol I don't know I just ****** up and made it worse I'm so depressed I just want to kill myself he hates me now and he's the only one I trust . I don't know what I did wrong