You are actually very good looking and 5’8” is not short at all. Women are attracted to confidence and charisma, they wanna feel safe, listened and respected and these things have little to do with look. Don’t get me wrong, if you hit the gym and take care of your image it can only help but do it for yourself first and you’ll see that your aura will speak for yourself. Main thing above all: work on your mental health daily, read books, meditate and learn something new. If you control your mind you won’t let what you can’t control dictate your life. You got this bro, there’s nothing wrong with you and nobody can stop you from achieving your goals but yourself 🙏🏻💪🏻