<human>: Can you give me the gist of the text in a nutshell?

Hello!

Me (F/23) and my boyfriend (M/25) have been together for about 3 years. We have been living together since 08/14. He cheated on me about 5 months ago. I found out only 2 weeks after it happened. It wasn't an ongoing thing, they went on one date and had sex afterward. 

We have worked on building trust back. He is very adamant about wanting to stay together, and has worked to be fully transparent. He has also done a lot of stuff just to make me feel better in general. i.e. Being more considerate, cute dates, presents, etc.

While the trust isn't fully back, its is improving. 
What isnt improving is my self esteem. It took a huge blow when he cheated. Im actually really attractive, 9/10. At least I was before this happened, Ive now put on at least 10 pounds and have stopped working out so im sure I just look less toned too. But I cant seem to peel myself off the couch (and it doesnt help that I'm in grad school and constantly swamped with homework).
The girl he cheated with was at best a 6/10 but I cant help but feel inferior too her.
My boyfriend is all for trying to help me gain my confidence back but I don't know where to start. I've googled stuff, but it never seems to hit the nail on the head.
<bot>: Can anyone help me figure out how to get my self esteem back? or ideas he can incorporate to help me build my confidence back up?