Friends?

How do people keep friends with this? Every time I spend time with my friends someone always has to make a comment about my weight or what I eat or give me a lecture. I fainted while out with my closest friend several months ago and now get reminded of this every time I see her… I love my friends and it makes me happy to spend time with them but being made to feel like a child makes me want to cut everyone out permanently. How do people manage the opinions and commentary of friends that nominate themselves as experts?