Nope. I'm me because I want to be me not because I want other people to like me. The second I start doing stuff I wouldn't normally do to convince people to like me is the second I abandon myself. It's throwing away your life and your uniqueness for attention. Just not my cup of tea.
It seems like this could go way too far I mean just be who you are.. The next thing you know you to start hanging out at the same places and doing the same things and you would just lose yourself. Besides the next thing you know you'll be dressing alike!
It's one thing to take an interest in your crush/SO's hobbies and interests BUT it's a whole other thing to change and mold yourself into a different person than you are. Be honest to both yourself and to him first.
According to my personal view, a guy/girl must not change you that much that changed you completely. May yes if you try to learn more about his hobbies maybe you turn to like them yourself but not turn to a fake person because that means a lie so it makes you a lair.