Hi everyone! I started counting calories all the way back in 2009 at 200lbs

By 2011 I was at 135. So I've done this before, it's not my first rodeo. I, unfortunately, have gradually gained almost all of it back since then I'm ashamed to say. I've basically been up and down in weight for most of that time. I am now at 178lbs at 5'5.
I keep telling myself I've done this before and I can do it again but I'm having an extremely hard time this time around. I'll do good for a little and then something will happen and throw it all off. Has anyone been there? And are there any tips you recommend for getting back on track? I know my biggest weakness is snacking. I'm sitting down most of the day with a very laid back job so it makes it even harder not to snack.
Also please feel free to add me as well, maybe it would also help to have some friends and encouragement/ motivation