How to break up gently with someone?

Problem/Goal: How to breakup with someone gently? They're kinda nice naman to me. Pero narealize ko, my future would be fucked up kung lagi ko nalang ico-consider na "nice naman sya kahit paano" I want to finally stick on my standard.

Sobrang binaba ko standard ko para sa taong to, pero everyday, mabigat lang yung puso ko thinking.. sa dami na pinabago ko sakanya, at wala syang kusa, I'm already tired.. tired of telling what I want. Then ilan beses pa bago, bago gagawin. Gusto ko sana ng tao na isang beses ko lang concern, e they'll listen.

I have cried many times because I tolerate it kasi "nagbabago naman paunti unti" but I think enough is enough.

Lagi ko iniisip na "forgiveness" kasi yun ang no. 1 dapat sa relationship pero kailangan ba talaga ganito?

Gusto ko lang malaman how to break up with someone gently. Masakit rin sakin imagining that I'll be breaking up for the "SAKE OF ME" kasi kaya ko pa naman mag consider, pero feeling ko di ko na kaya pa ubusin sarili ko.

Give tips po how to end it gently, kasi mahirap rin sakin. Thank you.