(you are) the person who broadened my outlook and gave me a new view of the world
the person who widened my outlook and changed my worldview
「私の[視野](https://eikaiwa.dmm.com/uknow/questions/65436/)」= my outlook
「大きく広げ」= widen/broaden
「新たな[世界観](https://eikaiwa.dmm.com/uknow/questions/43717/)」=new view of the world/a changed worldview
「変える」=change
「私の視野を大きく広げ、新たな世界観を与えてくれる存在」= (you are) the person who broadened my outlook and gave me a new view of the world / the person who widened my outlook and changed my worldview
He opens my eyes to see the greater world and encourages me to learn the new way to see things.
He opens my eyes to the bigger world and lets me learn the different perspective.
そのお友達で世界が広がり、彼によって新しい世界観を得られるのですね!
[視野を広げてくれる](https://eikaiwa.dmm.com/uknow/questions/9101/)、というのは
He opens my eyes to see the greater world より[素晴らしい](https://eikaiwa.dmm.com/uknow/questions/31182/)([大きな](https://eikaiwa.dmm.com/uknow/questions/73809/))世界に目を向けるようにしてくれる
lets me learn the new way to see things 物事の新しい見方を学ばせてくれる
encourage me to learn〜、〜を学ぶように奨励する