1 I have known my best friend for 5 years.
2 I have had my backpack(schoolbag )since I was 7 years.
3 I have wanted to do skydiving all my life.
4 I have been a pupil since the first form/grade.
5 I have always loved my parents.
P.s
PRESENT PERFECT PROGRESSIVE TENSE не употребляемся с глаголами want ,know,love,hate ,etc.