Struggling with snacking

I have been dieting since x-mas and have just gone up and down on the scale (few lbs) and still weigh exactly the same. I know I am doing stuff wrong but for some reason can't get myself to stop. Any advice for people who have been through this? My main issues I know I need to change first are:

1. Addicted to coffee but need creamer (and I probably put in 3-4 Tbsp./cup cause I can't stand the taste of coffee). I keep trying to quit drinking coffee but can't get myself to stick with it, tried switching to green tea, but just not as good.

2. Snacking at the office. I struggle at work cause there is always candy, cookies, chips, etc. out on people's desks and I"m always good until about 1:30pm or so and then I feel like I have to snack as if my life depended on it or something. The whole time I fight with myself not to, etc. but usually snacking wins (even when I bring healthy snacks - I still want to ALSO eat the bad ones).

3. Wanting to eat out and if I do get to eat out feeling like i need to treat myself cause I don't do it very often so tell myself it's ok to eat whatever I want.

I think these are the main 3 things i want to focus on first (I know I have plenty of other issues), but these are the toughest for me. I never head the snacking issue until I quit smoking and that was 6 months ago and I still can't quit snacking.

Would love some ideas.

Thanks!