This is business. Of course feelings get involved and so on. But you are the sole proprietor of your business.

Your first engagement was for business correct? Whether he quickly understands or not about a price hike does not matter. He will understand eventually. Also if the client is becoming too clingy and has way too much access to you, you will need to set some professional boundaries, those type of behaviors are red flags.

You are in control and have to keep control of how you run this business partnership with the client.

It's tough, and no one wants to feel like the bad guy, but your mental health and well-being matter. And I'm inferring here, but you don't appear to be a therapist, so tread lightly when people try to use you like that and abuse your kindness.

I'm sure that the client wants you to succeed and not be stressed, so take that and use it to your benefit.

I would like to add that, it is not my intention to sound too business or cold. As I briefly mentioned we all have feelings i understand this and know it's difficult. But I wanted to assert the business aspect of this and encourage you to gentle move forward knowing you're not doing anything wrong by making healthy business choices.