This is kind of funny. Someone that has a liking into you (gf/bf) should be supportive of what you do. That's the point of a relationship. Sure you may not always agree with each other but this is your dream, and she should acknowledge that.
At first I was so embarrass to show my videos to my friends and family, yet I eventually did. The results were so unexpected. I got so many love and support from my own people. It felt great, they pushed me to make more content. Sure they were a few that wasn't really supportive, and that's one thing you have to accept. You leave those people behind and keep moving on with the people who support you.
It's a movement, you don't stop.