I HAD the same problem.
You don't have to get rid.
Instead do the following (If she truly cares about you she will comply, if she refuses then get rid):
- State that you will be texting less with her as you're doing A-level revision.
- Switch all communications/posts when you revise and have a window of a few hours a day to speak with her.
- Tell her you will see each other once every saturday, make her feel she's in control so tell her that you guys can do anything you want to do.
I see what you're doing here, I did it myself, you're blaming her, but it's the same with your friends to, you must be committed, and it's all up to you, just submit time for revision and the rest of the time for others - i'm glad I didn't get rid of my GF bc she fully understood and is very supportive of me. If yours is not then why are you in a relationship with someone who only looks at their own needs and not yours? after all love is giving without expecting something in return.