Some messages only appear on my Mac I like being able to text off my MacBook.
Sometimes the responses don't go to my phone so I miss messages and only get them when I open my Mac. 

Does anyone know how I can receive messages on my iPhone and my Mac?
On your iPhone, go into Settings->Messages->Text Message Forwarding and switch the switch by your Mac off. Once off, switch it back on and then authenticate it on your Mac.