Don't know what to do

Caitee
Me & partner have been arguing/bickering for a few days on and off if you understand 
But when it all comes out its me & my stupid big heart of gold I can't say no for helping others & get myself in some right situations.
Like ended up watching kids while they went hospital even though somebody else could of gone with the father who actually walked out of hospital & refused treatment I mean why do I bother?! 
Take time out of my life & get it thrown back in my face.  My partner says its like I own a company amount of times they ring me for things & said he'll praise the day I sell that company, I can see his points clearly but feel awful as I know I'm pushing him away..... 
Had a breakdown tonight told me if I don't change I will loose him .... He's my everything it's torn me in two but after a lil while he gave me a hug and kiss 
I know I need to knock it all on the head but how that's my problem!