Everyone is not for you and does not deserve access to you. Some belong in the outer court, (body) others are permitted in the inner court, (soul) but few are eligible for entry in to your Holy of Holies. (spirit)
Boundaries are for those you love. Even those who have lifted you when down and carried you when lost, must be given clear parameters. Appreciation has its place, as does reciprocity, but another’s generosity cannot become a perpetual indebtedness. If the help has strings attached, then that is harm disguised as help.
Borders are for those that are indifferent. You nor I are going to be everyone’s cup of tea or preferred person. This is a good thing, because these may be the best relationships in life. The formalities and obligations, that come with loved ones is differed for candor and clarity. Keep non friends in your circle, because these few will offer truth when others are unable.
Blockades are for those opposed to you and specifically the God in you. When people show their true intentions, true character and true belief systems accept it. These cannot be won over or converted to an ally. They are mortal enemies and the enmities are for purpose. They are designed to keep you alert, on guard and on your knees.
King Solomon said it best: “Above all else, guard your heart, for it is the wellspring of life”