I want to know how to be a better boyfriend.?

im in year 10. i live in australia and im madly inlove with this girl ive been going out with for 6 months now. we have been through rough times with me suffering with depression but i really love her and she loves me back. i know it sounds early but i can imagine the rest of my life with her and there is no one else i want to ever be with. i love when we spend time together but i dont get much of an oppurtunity. both of us work casually after school and on weekends and i train for football nearly everyday except sunday. i have other sports to juggle inc squash, cricket and swimming. i love her so much and i feel like im not worth heaps to her. i wanna know how i can know for certain that she loves me and how i can improve our relationship. please help :)