IM SO HURT HELP

after 5 years of emotional, verbal, and physical abuse he left me for someone else easily. We are 19 and hes now with a 24 yr old who has a child. What’s wrong w me? He sucked the beauty and life out of me. I don’t even know my worth anymore. Why is she getting the better version of him. At this point i just want to hate myself. Why did i have to go through all that for her not to? Why was I so easy to leave?