What do I do? I've run out of ideas

me and my boyfriend have been together for just under 6 months now. i went on the contraceptive injection 4 months ago. i was told it would take 6 months for my hormones to balance out. i went through a phase where i was really quiet and had mood swings. my boyfriend tried his best to cheer me up and in the end, coz i was quiet and didnt change for 3 weeks. he gave up trying now im out of that mood, hes gone the quiet one and im trying to cheer him up. but he wont make the effort anymore and is always blunt with me. we are having arguments which i hate. we have both run out of ideas to get everything back to normal again and we are both desperate. he says he doesnt want to lose me and still really loves me and im the same. please please please help. thanks in advance :/