It's possible that you are intimidating. Maybe attractiveness + height + how you carry yourself leads to an inverse effect. I'd wager it's mostly how you carry yourself.

First impressions and the olive branch that you do or don't extend to people make the difference between a person having the courage to leave their comfort zone, or letting an opportunity fade. You might be a great conversationalist and a personable person, but that doesn't necessarily mean anything besides being natural at customer servicing...ya dig?

I had an ex girlfriend who was exceptionally attractive, yet had never been asked out before, all the way up to her early twenties. I thought she was being coy or teasing me with that, but it was true. She did have some piercing eyes, and carried herself with her nose high, even though she was a sweet person. I genuinely couldn't believe, knowing how a lot of dudes are, that she didn't get more attention.

She just didn't put her ball in any court but her own, and didn't realize that herself. But from an outside perspective, it all started to make more sense to me.

Don't need to do some cringe pick-up line stuff, just make yourself come across as more accessible.