First, I have to say that I'm proud of you for wanting to get along with your little bro! That may sound silly, but it takes maturity to desire harmony in your family life when everywhere you look society is telling you that family discord is just a part of life.

Little siblings can be quite a challenge! I have a sister who is seven years younger than me, and when I was in high school I could definitely relate to your situation. This may or may not be the case with your brother, but I eventually realized that my little sister was acting up, getting into my stuff and trying to be downright annoying simply because she wanted my attention. She was being bratty because she looked up to me and wanted me to take notice of her. Really, she wanted good one-on-one time (positive attention), but since she was too young to know how to communicate that, she settled for the negative attention she got when she ticked me off.

Whether your younger brother is craving your attention or not, as the older sibling you're going to have to take the initiative if you want a harmonious relationship. The apostle Paul gave us some great advice on where to start:

Set an example for other followers by what you say and do, as well as by your love, faith, and purity. . . . Be sure to keep on reading the Scriptures in worship, and don't stop preaching and teaching.
1 Timothy 4:12-13

I could write forever about all the implications of that verse, but in a nutshell, your little brother is watching you very closely, even if you don't realize it. You set the tone of your relationship by the way you treat him and react to his antics. Your words, the way you act, the way you show love, your faith and your purity are a model for him, even if it doesn't seem that way right now. Make sure that you respond to him with patience even when it's hard, and go out of your way to show him that you care for him. That way, even if he doesn't completely stop pestering his big sister, you'll make God proud!

Here's another verse you may want to memorize for those moments when you're tempted to wring his neck. ;-)

Do your best to improve your faith. You can do this by adding goodness, understanding, self-control, patience, devotion to God, concern for others, and love.
2 Peter 1:5-7

Take some time to talk to God about the way you interact with your little brother. Be honest about how you’re feeling, and ask Him to change your heart if it needs to be changed. Be sensitive to what He might ask of you in return—maybe to apologize to your little brother for something you said, or to spend an afternoon with him. Or He may urge you to talk to your little bro (calmly and gently) about the way he has been behaving and how it makes you feel.

And if all else fails, remember that this season will be over before you know it. Someday soon your brother will grow up and you'll probably have a great relationship. Just keep doing your best to treat him with respect now and pray earnestly when you feel your patience wearing thin!

Love,