What makes a guy go from patient, caring, respectful, clingy to distract & hard to get?

Trying to understand a situation im healing from.

He went from wanting to take me on a proper date, telling his family about me and having me over at his, turning down others, reassurance he wanted a relationship, seeking reassurance from me I was serious, wanting to be around me daily, holding my hand, always checking in on me, wanting to be around me and my friends just to chill, offering me rides just to see me, texting me even just to ask if I’d ate, always making an effort with his apperance

to … distant, leaves me on delivered for ages, very sexually forward, playing hard to get, talking to others, not wanting to be seen kissing me, won’t see me for weeks, won’t bring me to his place acts like he doesn’t care, doesn’t hold my hand anymore and seems awkward when I do, is sweet around me but a bit distant, yet seems confused when I’m distant, vents about depressing stuff, shown up in the same joggers two days in a row. And he reassures me NOTHING changed and he’s still interested and wants me

What makes a guy go from patient, caring, respectful, clingy to distract & hard to get?
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