I feel so numb, I need advice!

I often feel like I'm just going through the motions of life, almost as if I’m not really present. Sometimes, I struggle to find meaning in anything, especially knowing that we all eventually die. Is this a normal feeling? (19 F) I keep hoping this sense of hopelessness will fade, but it hasn’t.

I'm in therapy and taking antidepressants and anti-anxiety medication. I’m also newly engaged in a wonderful relationship! I feel like these should be some of the happiest moments of my life, so why do I feel so hopeless and just like a walking drone? How do get motivation to do anything? I’m afraid I’ll ruin my relationship, I just feel so lost?

any advice?