My girlfriend said she wanted to break up because she was afraid of getting deeper and deeper.

You are only in junior high school, and you are not sure about your future life. The result of puppy love is often bitter. Let me give you two suggestions:

1, show your manhood, confess to both parents, and give her a reassuring promise that she will never be separated again (I'm not talking about letting you marry your parents, but reassuring their families that your daughter will accompany you without worrying about her physical and mental safety).

2. Let you all be free and let love live. If you can't bear the responsibility and pain brought by love, let go and let both of you have a good love memory.