The best gift to give a friend is to pray for them. You don't necessarily need to tell them even. Some of the best things I do for friends, they don't know about.
Make a list of your best friends. Use it to go one by one in prayer on their behalf.
Now make a list of the people you don't particularly get along with...and pray for them one by one as well.
At the end of this time, you will have spent more time with God. That makes you better...and God has heard of your heart on the people you've brought before Him.
Make a practise of it.
3 John 1:2 (MSG)
2 We're the best of friends, and I pray for good fortune in everything you do, and for your good health—that your everyday affairs prosper, as well as your soul!