Never-Ending Story

Hello everyone,
I am one of those people who have never been happy with their weight. (I admit I try not to focus too much on weight, I go more by clothes sizes) My mother yo-yo diets massively and I have never really wanted that food-obsessed life.
I used to be very active and whilst I still ate a fair bit my weight never caused me an issue but along the line the activities stopped but eating habits didnt. So naturally the weight started to gain.
I took to going to the gym regularly with a friend, shifted my general day to day habits around to loose some weight. My target was merely to fit in a UK size 14 jeans, I was a UK 16-18 at the time (depending on the shop), doesnt sound like that much of a loss right? Well in just shy of a year I lost some 9kgs (nearly 20lbs) but the size 14 jeans I had bought (from a particular shop that arent overly generous) still didnt fit. For some reason everytime I weighed myself and saw the weight shifting I got a boost, but everytime I put those jeans on and they didnt fit right (did up but were too tight) my mood just dropped.

I think I got a little obsessive, other size 14s fitted (different shops) and all women know different shops run different sizes but my target was THOSE jeans and it wasnt good enough.
Sadly a family member died and I used it as an excuse to stop, my friend stopped her gym membership and I found it too easy to "skip" workouts when being solely responsible.

I still have the jeans, I still want to get in them, and whilst I know its going to take work, Im still hopeful for some miracle. But if we are honest, we all are, arent we?

So if theres anyone out there who'd like to help me on this seemingly never ending journey, thatd be great.