I agree, "Boundaries" is a great book. It helps with every relationship you have. Partners, children, friends, everyone. I found the one thing that people who had been married for a long time had in common was...they all said, "I married my best friend". I looked for years for a "boyfriend" or a "husband". You won't find them. Just enjoy meeting "friends" and soon, one of your friends will become a best friend, and then, you'll find, you can't imagine enjoying anyones company more, or there is no one you'd rather share your good news with, than this friend. I believe the deepest love comes when you truely "like" your partner. Think about the relationships that did not work out, usually you can say, I didn't even really like the person, or the things they did or the things stood for, I was just in"lust" with them.

Learn how to say "NO". Very important. It is OK to so "NO". If you let someone talk you into doing something you really don't want to do, you get angry at "them", you're really mad at yourself for not being able to say no. It is much more fair to the other person to say, "sorry, I can't" than to tell them "yes, ok", then be mad at them, because you said yes.

Stand up for yourself, your needs and your rights, but without hurting others, be fair, and be honest and you will be happier.

Another good book is "Happness is a Choice", I've loaned it out, so I don't remember who wrote it. You can not control other people, but you can control how you react to how other people treat you. You can decide to not let other people bring you down. You were right to walk away, no one needs to stay in a situation that makes them feel bad or uncomfortable, and you harmed no one else while at the same time protected yourself.