I can't vouch for your interpersonal skills but so far, you seem to be doing well enough here. You give as well as you take. Seems to me there's nothing better than that.
Is there any way you can explain things to your brother and ask him to forgive you for being sharp with him, if in fact you were? Pride can really get in your way when it comes to that but put it aside if you can. You've got much to gain and nothing to lose.
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Psalm 119:105 Thy word is a lamp unto my feet, and a light unto my path.