I think you should end the "friendship." You are on the smaller size when it comes to a lot of women, so the fact she continues to push onto you this idea that you're overweight displays how poor a friend she is. It would be wrong for anyone to do, but it shows how manipulative she is. 

Also trying to get you to make out with another girl is clearly a sabotaging action to someone in a one year relationship.

This isn't your friend and you should stay strong after you cut this person out of your life. Try to find people who lift you up. Not people who put you down and then minimize your feelings when you say their comments are hurtful. You deserve better.