Is what she's saying correct?

That is what one of my friends did. She and and her boyfriend seemed to be perfect for each other. They were together for like 4years and people kept saying "wow.you almost seem like a married couple" because they matched so well.

She was not very happy to hear this and she broke up with him (after hearing things like that again and again) , because she wanted to meet more people as long as she is still young. She could not bear with only being with one guy and not knowing if there might be something she is missing out. I understand her feelings, but just keeping looking for something better. That is kind of scary.

Hey!
Your mom is totally right! You don't need to stay with one person until you know what EXACTLY what your looking for. Go out with other people because there are sooo many people and so many different personalities and you never know. there might be a better guy for you!
good luck!