girlfriend is angry/upset at me and i dnt knw why.., woman ai ai Options

[sighter]

ok so i've been seeing this girl for about +- 2months now, i really like her alot and we get along very well, but lately anything i say is wrong... like for example i said "hey" on that fb chat thing and then i get a msg bk "Oh so all you can say is hey.." at first i was like ok maybe she is in a mood, so we chatted all nice after that, but then she started to get angry at me again for little things i said... but when she had to go offline to go out or something i said "ok cool, bye :) mwa mwa" and then all hell broke loose, its like she is on defensive mode, telling me how can i only say bye and i dnt show enough "love" for her and bla bla... then later that nyt i sent a msg saying sorry if i upset her in anyway and that i miss her to bits.... havent heard back from her since, pls help... im a confused male that just likes things to be simple and i hate fighting.