ual frustration??

Im 16. Me and my boyfriend had an "healthy" ual life. He moved a month and a half ago. I been really irritable and bitchy lately. Me and him are always fightin and bickerin now. Sitting back and thinking about it... im always the one startin the fights. I pick at everything he says. I didnt used to be like that until just a week or 2 ago. could this be because of ual frustration? or is it because im just such a bad girlfriend i cant realize a good thing when i have it and i always have to ruin evey thing? I love that boy sooo much<33 He's been my best friend for 3 yrs.