I don't understand the confusion. He's a man who likes his ego stroked. You are someone who will stroke his ego with minimal input from him.
He's actually a really obvious user and loser, but you have fantasised him into something else. this 'relationship' actually isn't between you and him, it's between you and your fantasy of who he is.
The reality man is cold, has used you, and is clearly with someone else. the fact that you are limitlessly available to him and yet he cannot be arsed to even go for a walk together? Only a fantasist would interpret that as anyhting but a brush off. Only a fantasist would allow a few kind words to undo months of poor treatment. Only another fantasist would understand the power of the fantasy - I've done this too, many times.
Stop analysisng his words and actions. Get analysing yours. What part of you thinks a text exchange is a relationship? What part of you believes that is an ok way to treat you? why are you accepting his behaviour?
I see someone has sign-posted you to Baggage Reclaim, so instead I will share this article from Melanie Tonia Evans that talks about how to self-partner - it's what I am learning to do, and it's how I am not being a fantasist any more. I love and value myself too much to mess around fantasising over time-wasters. You can get there too.
blog.melanietoniaevans.com/what-is-self-partnering/
She includes this story from Don Miguel Ruiz:
“Imagine that you have a magical kitchen in your home. In that magical kitchen, you can have any food that you want from any place in the world in any quantity. You never worry about what to eat; whatever you wish for. You are very generous with your food; you give your food unconditionally to others, not because you want something in return from them. Whoever comes to your home, you feed just for the pleasure of sharing your food, and your house is always full of people who come to eat the food from your magical kitchen.
Then one day someone knocks at your door, and it’s a person with a pizza. You open the door, and the person looks at you and says, ‘Hey, do you see this pizza? I’ll give you this pizza if you let me control your life, if you do whatever I want you to do. You are never going to starve because I can bring pizza every day. You just have to be good to me.’
Can you imagine your reaction? In your kitchen you can have the same pizza even better. Yet this person comes to you and offers you food, if you just do whatever he wants you to. You are going to laugh and say, ‘No thank you! I don’t need your food, I have plenty of food!’
Now imagine the exact opposite. Several weeks have gone by and you haven’t eaten. You are starving and you have no money in your pocket to buy food. The person comes with the pizza and says, ‘Hey, there’s food here. You can have this food if you just do what I want you to.’ You can smell the food, and you are starving. You decide to accept the food and do whatever the person asks of you. You eat some food, and he says, ‘If you want more, you can have more, but you have to keep doing what I want you to do.’
You have food today, but tomorrow you may not have food, so you agree to do whatever you can for food. You can become a slave because of food, because you need food because you don’t have it.”
Feed yourself, and this man's crumbs (and the crumbs of men like him) will be unpalatable to you. You certainly won't be spending time worrying about his motivations and how to make him happy so he'll feed you.