Hi Senia, At least you have faced up to the fact that you have a problem. There's TWO things that are hard to do. The first is to fathom out what you intend to do about it and the second, and the hardest of all, is to stick to it!
I'm sure you know only too well that apart from the looking good it's the fact that you will FEEL soo much better when you start eating healthily and losing some weight.
Set yourself some mini goals - Just to lose 7lb in the next month perhaps, anything so you can count a success to your list and that fact will spur you on to better and bigger things. Don't try to be on a drastically reduced diet - a sure failure move.
But, HEY! You've been there before so I know you know what it entails. We are all rooting for you!
All the very best in your endeavours...