Do you think because of personal issues (mental, emotional, physical, financial, situational) that it is impossible for you to quit or stay quit?
Do you think nobody really understands just how hard it is for you?
Have you "tried" and "tried" and "tried" and just can't get quit or stay quit?
Do you tell yourself that there is something just "wrong" with you that doesn't allow you to be successful like others?
These thoughts need to be addressed (lies debunked) if you answered yes to any of these questions so you can quit telling yourself such nonsense. Until you change your self-talk, drop the helplessness, and start to believe in yourself (and do the honest work required) you'll continue to run around the relapse Merry-Go-Round "trying" to get a hand hold so you can jump on to smobriety.
Educate yourself about nicotine addiction (it helps to understand why you feel the way you do physically, emotionally & mentally when you quit) and put together your Quit Kit to help you get through the quitting process. The hardest part is always in the beginning. As far as "trying" goes -- remember TRIUMPH is the word "tri" with just a little more "umph". Lean on the community. Pledge daily and mean it.
You need to absolutely believe that no matter how bad you may feel at any given time in the first hour, the first day, the first week, the first month, or the first year, that it will change eventually for you, bit by bit, for the better as you go through the process if you just don't smoke. Not One Puff Ever.
It's doable. You CAN do it. A whole brand new shining smoke free world awaits you once you stop running around "trying" to catch the Merry-Go-Round. Jump on instead. No more Day One's for you. Every day can be a Day Won!