How can I be a bondservant

I have been challenged over the last couple months in ways that I thought I would never be challenged in. There are parts of me that have been revealed that I could say I would not like to come out again. I have realized, these last months, that I am a very selfish person. I like to give to people, but alot of times, when giving, I give with the expectation that the person I'm giving to will give back to me in the same way I've given. I am very wrong in assuming that God gives back to those who are giving in the exact same way that they've given. When giving to others, we should expect nothing back in return, but trust God will handle all the details. I have tried to put God in a box, by saying that I will only give to others, if He will bless me by returning to me in the same way.

"Whatever you do, work at it with all your heart, as working for the Lord, not for men." Col 3:23

I am also learning to set boundaries when giving to others, so that I don't get too exhausted and sick & am rubbish at anything. I think we should give without expectations, yet make sure that we take care of ourselves physically, spiritually and mentally. What I was doing in the past was doing everything for everyone, yet never complaining & holding it all in, then exploding. I've learnt to talk things out and put boundaries up, so I know that I don't run myself ragged, but to give different options if I can't serve that person in the way they'd hope, or just to say no. I need to not feel bad if I can't do everything, but trust that God has everything under control & not worry about what other people think about me if I can't serve them.

"Trust in the LORD with all your heart and lean not on your own understanding;
in all your ways acknowledge him, and he will make your paths straight." Prov 3:5-6