Sorry you're stuck. Daily bonding behaviors may help. Bonding behaviors are subconscious mammalian attachment cues, which can help improve the harmony between you - without talking.
If you can't even exchange affectionate, non-sexual, touch yet, you might want to start with Morita therapy. It's a way of using Buddhist principles (selfless service) to ease the tension between you...and soothe your jangled nerves.