How do I stop being emotionally submissive?

I never stand up to my girlfriend, and I lose arguments that I should have won on purpose because I worry about her feelings.

My friends make fun of me and always say something like, "you better ask your girlfriend for permission first..." My sister and my older brother left for college when I was young, and my dad wasn't in my life much. My sisters bossed me around, and I said nothing because I made them cry once as I felt guilty.

How do I become a real man and let a woman know her place?

How do I stop being emotionally submissive?
Post Opinion