Stop saying YES all the time. Try to pause or take a breath before responding to someone’s request. You may want to answer requests with "I need to think about it first, I’ll get back to you" or "Let me check my schedule and call you back". Use any phrase that you feel comfortable with that gives you time before you automatically respond with YES.
Take small breaks, even if you feel guilty. You won’t always feel guilty, but most likely in the beginning you will. Remember that your mental health is well worth the aggravation you may have to take from others. What’s important is you. When you are healthy, those around you will be healthy!
Figure out what gives you pleasure. For example, you may like reading magazines, watching videos, going to a park, or listening to music. Give yourself permission to do those things and then enjoy them.
Ask someone to help you with something. I know this is a hard one but you can do it! After all, everyone else is asking YOU for favors, why shouldn’t YOU ask THEM? Just be tolerant if they turn you down. Just because you have always told them “Yes” doesn’t mean they always have to tell you “Yes”.
Check in with how you feel and what you are thinking. It’s important to be aware of these things; they’re part of who you are. And then try saying what you feel and think more often. Just remember to have a little decorum in certain situations.
Many people pleasers believe that nobody will like them if they stop doing things for other people. If someone stops liking you because you don’t do what they ask, then you’re being used by them and probably don’t want them as a friend anyway.