So this took me quite a long time to answer and some I am not quite sure of but here it goes:
1. C
2. B
3. R
4. L
5. D
6. Q
7. G
8. E
9. K
10. I
11. H
12. O
13. T
14. P
15. J
16. A
17. F
18. N
19. M
20. S
Hope this helps, sorry if some are wrong!
I can’t tell where your third stanza is due to how you typed it. You didn’t make it visible enough to tell.
The theme is about how dominant love is over all other forces. Romeo and Juliet would rather die than not be able to love each other. Thus, love takes priority even over living the rest of their lives.