I think there is a normal range of show of affection that is required/expected in relationships. It depends on your culture. What do most people do?

When someone needs much more than what most people do, they are considered too needy. When someone shows much less than what is the norm, they are considered aloof.

If you feel like someone is needing from you more than you can or want to give, then it’s just not going to work. You can up your game a little in the show of affection of someone you truly feel affection for. But you can’t totally fake something.

Is upping your game considered manipulation? Maybe. You’re learning to give more of yourself to make someone else feel good. Is that bit of manipulation a bad thing? Not if it keeps you in a relationship you want. Then it’s a win-win. If it feels good for them, then if it feels good for you, it’s good.

As for manipulation— I usually recognize it. But some people are so darn good at it, that you never know you got played.

All these things like show of affection that is the norm and manipulation red flags are so hard to teach. I wouldn’t know how to explain it to someone. You just learn by what you see and experience.