Height?

I am a fairly tall girl at 5'9''. And I admit, height is a factor for me because, quite frankly, I don't want to always feel taller/bigger. I'm average (not thin, not heavy) and I like to be feminine and wear heels. I'm typically attracted to women who are around my height (same height or 1-2 inches shorter). My sister (who is bisexual) feels that the taller person must naturally be more dominant and/or masculine. I'm not sure I agree but I still am a bit worried I will feel the need to overcompensate. 

The point is, I'm beginning to fall for someone who is small -  5'3. She's got the whole vibe I'm attracted to but before casual flirting becomes more, I wanted your opinions. How much does height define a relationship (all aspects)? How do you make up for the height gap? Is it ever awkward? I guess I am worried out natural inclinations or personalities will change because of such a height difference. 

If you can't tell, I've been taller than everyone pretty much all my life. Still working on childhood insecurities a bit.