Both sentences are understandable, but they don’t sound very natural. Here’s how people usually say them: You don’t make me feel like you care about me. You don’t make me feel like I’m important to you. The words “like” and “important” are more natural in this context. Here are the short and simple versions: You don’t show that you care about me. You don’t show that I matter to you.

“I don’t feel like you care about me”