I have been short all my life. I am NOT going to write that short stature does not have an impact on one's life; HOWEVER, most traits have an impact on one's life. Short, tall, fat, skinny, smart, stupid, lazy, energetic, optimistic, pessimistic--and on and on--all impact one's life.
If you think leg lengthening will improve your love life; then, you are sadly mistaken. Leg lengthening may cause a different population of persons to find you attractive; however, that population will not necessarily be larger or smaller than the current population that finds you attractive.
In my experience, many people will not find you attractive unless and until you become comfortable with who you are--it does not appear to me that you are comfortable with whatever good stuff you bring to a relationship and instead focus on what you perceive as a weakness; namely, your height.
If I was a woman and got the same vibe from you that you are sending out in your post, I wouldn't be attracted to you either. Rather than focus on your stature, I suggest you begin to honestly identify those traits you possess that you admire and value; then, begin to see yourself as someone with these genuinely valuable things to offer rather than as a guy shorted by the world. (Pun intended.)