Having a tough time

I am having a tough time with my quit right now,smoking cessation, it seems like i am always wanting a cigarette. I hate it, it is sometimes so hard for me to come up with reasons why not to smoke when I want a cigarette. Especially when I am around friends that smoke or stressed out from school,stop smoking now, or doing ANYTHING it seems like. I know quitting is very important, but my head keeps telling me I can quit later. I am tired of fighting all the time it seems like. I DON'T want to smoke anymore in all my heart but it sometimes I don't care. I want these crappy feelings to stop. I notice the benefits of not smoking already, but I wonder if it is worth going through all this heartache. I WISH I HAD NEVER SMOKED IN THE FIRST PLACE. I am 4 days into my quit and from what I hear this feeling doesn't go away anytime soon. I have read almost every article out there but I can't get these thoughts to go away.