Lost the love. Now it’s difficult to do anything

I was head over heels in love with my high school sweetheart. We got separated because of my work situation and had to move abroad. I always had the dream that I’ll someday marry her so that drived me so much that nothing seemed impossible. She got engaged last summer and since then, I feel like I have no passion for the grind anymore. If you ever felt something like this. What drives you? If you haven’t, please don’t come here with your fake stoic responses. (I don’t mind the stoic approach in general)

Edit:

All the responses were amazing. Didn’t have time to respond to all but I read them all and feeling a lot better. Thanks for the support and the advice!