How can you make your girlfriend get back with you after you lied to her?

The best way to make it up to your girlfriend depends on what you did. If you messed up and were seeing someone behind her back, you should eliminate contact with that person and be willing to sacrifice your privacy until that trust is rebuilt. You need to be willing to talk about it often in order for your partner to feel you really understand what they are feeling. Little things during the day can add to your partner's ease, such as making dinner, cleaning up the house, talking about her day, going for walks, taking her out, reminding her why she fell for you. Lastly, you should be able to make a couple commitments about future behaviour including honesty with yourself and what caused this behaviour. Therapy is a good way to explore personal issues individually and as a couple.