Something that can help me as a woman have more confidence in relationships with men

I'm 29F and I've always been a bit of a people pleaser. My college roommate cites it as one of my​ defining qualities. I'm usually very good at standing up for myself to strangers or people I don't have a lot of respect for, but if I care about keeping someone in my life I bend over backwards to make sure there's never any problems and they always feel happy and good around me. I was a doormat in my first​ two relationships, and then I was single for a long time. I'm a shy, fairly career oriented woman in STEM.

About a year and a half ago my dad (who wants grandbabies yesterday) had me read "Marry Him: The Case For Settling for Mr. Good Enough" by Lori Gottlieb and it was the worst book I could have​ possibly read. This woman's voice has infested my inner monologue and I'm no longer seeing things the way I did before.

I started dating again last year and I've had a few issues, but instead of thinking about them with my own brain, I hear Dr. Gottlieb in my mind reminding me​ that if things aren't going well, I can't think that I might have a better chance with someone else. It's a fallacy, she says, to think that you can do better, because as you get older you're less and less likely to meet someone better than you've dated before, so it becomes more and more important to settle. Before I read this book, I would have told you easily that I'm fine being single forever if it means choosing between that and being in a bad relationship.

I've been seeing someone for almost a year and I've noticed that I have constantly, constantly put my needs and desires aside, usually without even being asked, and now I'm very unhappy. Please suggest me a book that can give me someone else's voice to kill off Dr. Gottlieb's. Sorry Dr. Gottlieb. ​​​