I love my girlfriend so much but I don't think she trusts me
How can I make her trust me?:D :D

Don't act sneaky. Example your phone rings you jump up run in the next room answer it and talk secretively. You have loads of unexplained time, not that you have to account for all your time but if you have a pattern of a lot and she asks and you don't want to her.
Include her in things you might normally not take her along with you sometimes even if you don't think she would want to go.
Then too some girls can be unreasonable and accusing when there is nothing out of the norm.
If she is treating you like overly clingy and/or naggy it may just be her insecurity.

You can't make anyone do anything... really.

Why doesn't she trust you... is the question you should be asking yourself.

1. Do you do sketchy things? Do you talk to girls and hide it from her?

2. Has she had a bad relationship in the past?

Got to find the reason why first bud.

What makes you think she doesn't trust you?

Read How To Dominate Women by Gary Brodsky