Hi OP, i did!! 
I took a long hard look at myself, and actually thought (as the Mad Hatter said to Alice) "You've lost your muchness" please don't laugh at that!
I was tired, felt old and drained, and gave myself a good talking to, had a good cry and swore I would not be the same in a years time. I used to love company and socialising, and then just fell into the same boring routine that zapped me of any enthusiasm, pride in my appearance and piled on weight, which in turn meant I didn't feel like me anymore. My skirts and dresses got relegated to a suitcase gradually, until I was in jeans and trainers with my hair scraped back every day, little things can have a snowball effect.
If you look in the mirror and don't like what is staring back at you, then work on finding ways to change it one bit at a time. I didn't try to do everything at once, it would have been overwhelming and I'd have just given up again
I made a list of things that were achievable in a month, for me, that was hair dye, a few treats for my skin, and started drinking lots of water. I took an hour a day for just me, and didn't feel guilty about it. Then thought about what I could do in 6 months (drop weight and get fitter). Then what could I do in a year (at least know what I want to do when my youngest started school, and work towards it).
I wrote an eating plan that I'd be able to could keep to, and rewarded losses with a couple of items of clothing that I felt like me in again. And got out my suitcase of skirts and dresses too.
Over the course of 6 months I went from a size 16 to a 10 healthily, started to pick up the phone and arrange to meet up with people I'd put off calling (because I was embarrassed by how much I had got myself in a rut), and enrolled in online learning courses that I'd also put off doing because I'd had a defeatist attitude that matched my outlook then.
If you want it enough, you can and will do it, good luck OP! x