Golf..someone help me quick?

im 18 and my handicap has been 5 now for the past 2 years cant seem to get it lower i practice with my friend alot hes off 1 and he just plays cl everytime we go out we practice for like 3 4 hours 3 times a week and i cant seem to play very well on the course he said ive got the best equipment for it i have the new 910 d2 titleist driver nike 3 wood titleist zm blade irons 3 vokeys and a sctty cameroon i wnt to get down to scratch or even lower can someone help me