Talk to me girls i have a little problem with this guy?

well ive been talking to this guy off and for like 2 yrs...we been seeing each other as well and any ways im having a problem with the off and on part....we start talking for like a month and seeing each other but then all of a sudden he stops calling me and texting me ill tex him but i wont call him and he wont tex me back or call for days and then all of a sudden he starts texing me and calling me again...and hes so sweet he talks to me about any thing ive even cry-ed twice in front of him cuz what we have talk about he all ways gives me good advice all the time...and he has two baby moms he ant with none of them but i just don't under stand why he stops calling me for days and then he starts calling me again whats going on please help me i really like this guy?