Mental Breakdown

Hello. I am almost 31 years old, I have been NEET since I graduated from college at 24 yo. I feel useless and not able to cope with real world and adult life. Last week I saw a high school class mate driving a car, it made me felt bad about not having money nor even a license, let alone my own vehicle. But today I broke down after I saw another high school classmate with her own baby. To think I can't even provide for myself and now people my age are providing for themselves and their own children.. I feel particularly useless. It's like there is a giant gap between me and normal people. EDIT: typo.