Hi there 1dayatatime ,
Firstly are you doing CBT as this will help banish the negative thoughts you have.
Here are some links for online CBT
It might help if you increase your daily activity - toning and cardio would be best if you want to lose weight and look slimmer.
Cut down on anything with lots of saturated fat and/or sugar in it.
Make sure you eat at least five fruits and vegetables each day and drink eight glasses of water each day.
Increase your fiber intake as high fiber foods are lower in calories and bulkier , making you feel fuller quicker.
Also eating slow energy releasing (i.e. low GI) foods can stave off hunger for longer.
It helps if you stick to strict meal times so your body gets used to eating the bulk of your food at these times , then you can snack on fruit/veg inbetween to tide you over.
Eating slower and chewing food for longer can also help you feel fuller quicker.
I hope this helps.
Take care ,