How to entice him into caring more?

My bf don’t give me the attention I deserve and it makes me clingy, but I really don’t want to call things off.

Is there a way I can get it in his head that if he doesn’t start doing shit for me I’m going to break up with him? I won’t threaten with breaking up because I feel like that’s toxic, but I can’t straight up ASK him to pay more attention to me because that hasn’t been working.

Should I start ignoring him? In other words, not prioritizing him as much as I do? Or is that toxic.

Ever since the start of our relationship in high school I’ve constantly asked him to text me more often since we are ldr. He always comes up with excuses that are bs and I only realize it when it’s too late to bring it up again.