...until it happens, will you stick with the one you have?
sabi nila, laging merong better na dadating kesa sa partner mo. and it's for you to decide. to be contented. to be proud on who you initially chose.
otherwise, you'll keep on jumping from one relationship to another.
so yes, you have to accept the fact that someone better will always come along.
but it doesn't always mean that the "better" version is actually better for you :) for all you know, who you have may be actually the "best" combination for your personality, dreams, at kung ano ano pang basis mo para masabing "swak" sya sayo.
goodluck. pampagulo lang talaga pag me choices pa e ;-)