I am not a woman but I just want to say at 6 ft 4 you are far from being a giant and I don’t think you have anything to worry about. I am 6 ft 6 and my height has never been a disadvantage to me when it came to attracting women in between my first girlfriend and my Wife and my biggest disadvantage was always having disabilities.
You need to have more confidence in yourself and stop caring so much what other people think.