realize the grass isn't always greener

I struggle back and forth with this..sometimes I’m perfectly content…other times I think I’m selling myself short…do I accept what I have..or do I try something new…do I take a chance at something…or play it safe?? I mean…what if it’s better..?? ..I hate that phrase “what if”...maybe if I deleted that phrase from my vocabulary I wouldn’t have a desire to see if the “grass is greener”..Is this selfish of me to want to know ??...I feel guilty at times for thinking “what if”...just rambling now…...