8 years and he just walks away for a girl 10 years his junior!

If he did it to you, eventually, he'll do the same thing to her. This is of little consulation to you now because you're angry and hurt by his actions. But look at it this way, at least he didn't slip behind your back and cheat on you.

Reading posts that the girl makes about how happy he makes her and how wonderful he is, only adds fuel to the flames -- STOP reading them. Of course she's silly happy right now (another thing that makes you angry because he used to make you feel that way.) She's young and dumb, he's an idiot. He proved that to you when he left you. Instead of being angry at them, focus on positive things (like your son)

Whenever your ex has something negative about you, shrug it off. He gave up his right to any opinions about you (other than your parenting skills that pertain to your child) when he left the relationship. His opinion of you is of no more value than any other schmuck you'd meet on the street.

Stop worrying about the eight years you were with him -- you're only 23. It could have been MUCH worse, you could have been stuck with him for 28 years!

Eventually the pain will go away because it hurts to be rejected. Move on with your life like he has with his..living well is the best revenge.

its obviously this guy you were with has issues with commitment and is a child himself. You have to be strong and prove to him that you don’t need him in your life. I know its easier said then done but your child deserve more and shouldn't be apart of this type of situation. I would look for option, not in the dating direction but in strengthen your mind and heart. You'll never move forward unless you fix those things. Possibly going to group function, see a therapist or move to another state and start over else where. Guys hate it when their ex turn out better off then they are...don’t let him see your weakness but have him see how successful and happy you are. If you gives you BS about stuff tell him to back off and don’t give in to his negativity that will only feed into his ego. You’re only 23yrs old, you still have so much more to see and live for, trust me. Good luck to you.