This relationship began when you were both very young. It’s understandable that you have hurt and confused feelings. Also it does take time to sort through these different emotions that surface.
It sounds like your ex was not happy and genuinely desires to be on her own. It’s really not good to go from living with parents to then living with a partner. We should have time to learn to live independent and on our own. A person grows and matures and changes so much during their 20’s. So by age thirty a person looks at a lot of things differently.
At age 30 you are still young enough to consider more education, having some freedom for a few years before finding a partner to have a family with if that is something you want in your life.
You should have a partner you can enjoy intimacy with and who can appreciate you as a person.