Is he just ignoring me or is he really depressed, is he looking for a way outta of this relationship?

Been doing great some ups and downs but nothing to serious. Lately, my boyfriend has just been down in the dumps, and will hardly ociate with anyone.. I have been there for him through thick and thin, and now all he does is not talk, and won't do anything hardly, unless you have to beg for him to do something.. I have given him so much space, and he is not actin normal... We are ually active, but he really don't even show any enjoyment, and when we are finished he usually gets uo and leaves most of the time... Is he losing interest, or is this just depression.. I need help.. Any advice?