I agree number one thing is to be yourself. I agree with Ms. Teacher that your ex-gf broke up with you for your height is just an excuse. She knew going into dating you what your height was...

I do think it is true that many women want to date tall or at least taller men. However, like many physical attributes, this is often a preference and if she thinks you are great in other areas, height may not even play into it because she likes you and is attracted to you for other reasons.

For me, I do prefer to date men who are at least a little taller than me, but I am 5'7 and I've dated men from 5'6 to 6'9. Actually, I find I tend to date men who I consider to be on the shorter side (5'8-5'9) not sure why that is exactly except they tend to be the ones that are attracted to me, I'm attracted to them for various reasons and they aren't so cocky. While my tall male relatives tend to date short women. Go figure.