Is this what kind of love is?

We've been in a relationship for 2 years and have known each other for 3 years. In the beginning, everything was perfect, but slowly, I started getting mixed signals from him. Some days, he'd shower me with love like I was his whole world, and other days, it feels like he just doesn't care anymore. He still does some things right—like dropping me home no matter where we are, waiting for me after college, or meeting me for just 15 minutes after work. But he doesn’t defend me when his friends make jokes at my expense. He doesn't put in the simple efforts like reassuring me or planning dates—nothing. Whenever I try to confront him face-to-face, he avoids the topic, and then later, he brings it up over text (which he knows I hate). For the past year, I've been waiting for him to change, because every time I think about breaking up, he promises he’s trying, that he’ll improve, that he’ll give me what I deserve. What should I do? Should I keep giving him more chances? I’m mentally, physically, and emotionally exhausted. He’s never there for me emotionally; it’s always me begging for effort, love, and attention. And now, I’m tired. I don't care how he treats me anymore. I feel completely drained because this has become a never-ending cycle—he apologizes, I forgive him, and then we’re back to square one. It breaks my heart to even consider giving him another chance, but I can’t seem to leave him.