i have tried several times to prove to my girlfriend that she can confide in me but it still doesn’t work out the way I want it to be. She knows almost everything about me while I know just little about her and when I ask her why she doesn’t trust me she says that she doesn’t know and think I’ll be able to keep her secrets.

So she tends to keep things to herself and says I ask too many questions of which she would sometimes and most times not answer me. Honestly I don’t know what to do and I will not want to lose her to another guy
Please what do I do and how do I make her trust me?