I am so sorry for your loss, first of all. My dad just passed away this summer and so I know how you feel. I am around your age. At my dads funeral (this is the best it just touched my heart SO MUCH) but it is Hymn 124. Its called Be Still, My Soul. Here are the lyrics:
Be still, my soul: the Lord is on thy side.
Bear patiently the cross of grief or pain.
Leave to thy God to order and provide;
In every change, He faithful will remain.
Be still, my soul: thy best, thy heavenly Friend
Through thorny ways leads to a joyful end.
Be still, my soul: thy God doth undertake
To guide the future, as He has the past.
Thy hope, thy confidence let nothing shake;
All now mysterious shall be bright at last.
Be still, my soul: the waves and winds still know
His voice Who ruled them while He dwelt below.
Be still, my soul: when dearest friends depart,
And all is darkened in the vale of tears,
Then shalt thou better know His love, His heart,
Who comes to soothe thy sorrow and thy fears.
Be still, my soul: thy Jesus can repay
From His own fullness all He takes away.
Be still, my soul: the hour is hastening on
When we shall be forever with the Lord.
When disappointment, grief and fear are gone,
Sorrow forgot, love’s purest joys restored.
Be still, my soul: when change and tears are past
All safe and blessèd we shall meet at last.
Be still, my soul: begin the song of praise
On earth, believing, to Thy Lord on high;
Acknowledge Him in all thy words and ways,
So shall He view thee with a well pleased eye.
Be still, my soul: the Sun of life divine
Through passing clouds shall but more brightly shine.
Hope it helps,
Again I am so sorry for your loss but when I lost my dad my mom told me 6 key words," It will get better over time.", remeber them and whenever you are sad or miss him sing, or hum, or just think about the song in your head, or think about the sentence my mom told me,
~Cool One :)