Wow, such a good question. First let me confess...
I can relate to this. I have been guilty of being so gosh darn agreeable that it seems I am sychophanting (ppl pleasing) everyone, with no backbone or solid opinions of my own. I always go in looking to find what's right with folks and things, as well as seek to keep peace and find resolution. Sometimes, though, there is no problem, lol. My desire to fix things and be super sincerely kind to all (a quality, the kind part that is, I like in me) has caused, at times, a big pile of chaos and some harsh and painful rejection and I didn't know why. What I was causing most, was conflict within my inner dwellings. Time, (I am a grandma) and much mercy and patience extended from Him and my loves has helped me to grow. He can help you too.
I shared all that to say this. I get it, I am not a fan of confrontation either. I am learning though, through Him, that opposition is not always bad, that He, Himself, uses it to mold and grow us. So like some here said, choose your battles, choose your approach, and choose to lead with Him in mind. I think that in order to really learn ourselves and trust the sustainability in relationships, we have to be willing to develop our own sincere mindsets, then show the core of who we are and where we stand. Those who accept you, even when you disagree with them, they are a gift from God. Hopefully, you, yourself are amongst the ones who accept you.
I need to wrap this up, sorry for being so wordy, but one more thing. You sound like a sweet person, who appreciates harmony. I think that is beautiful, but if your quest for zero conflict causes yourself some inner turbulence, take a deep breath and know He has you, and loves you very much. I think it is a good thing to use a loving and mindful approach, but like it or not, life and interaction comes with occasional opposition.
I guess it comes down to balance. Pray about it, keep getting in the word. Peacemakers are a blessing but it has to be out of sincere love for Him and others, not out of a perfectionist or ppl pleasing mindset.
Loving hugs...