I think I depend on my girlfriend for happiness
A lot of people tend to feel the same. How do you depend on her?
I always feel great around her. I can't be myself with anyone else.
I see your point, but it's not healthy to depend on others for happiness. My therapist always tells me that learning to depend on yourself is the most important thing that you can do in life.
I agree with you, but I couldn't help it since I love her.
Because loving her and relying on her are two different things, you should learn to love and rely on yourself in order to avoid overburdening your partner. Otherwise, if you are too reliant on her, she may feel suffocated.