* Barbara Gordon (Batgirl/Oracle): Nightwing and Barbara have had a long, on-again, off-again relationship. They have a deep connection, built on mutual respect, understanding, and shared experiences as heroes. This relationship is often considered the most significant in Nightwing's life, and there have been numerous instances where they have reunited, even after periods of separation.
* Starfire: Nightwing and Starfire had a very passionate and intense relationship. While it was a popular pairing for a time, it ultimately ended due to their different backgrounds and worldviews.
So, who does Nightwing "love" more? That's a subjective question with no definitive answer. Both relationships have been meaningful and influential in his life, and he has shown deep affection for both women. Ultimately, his strongest love may be the one he's currently in, as his relationships evolve over time.
It's worth noting that current comics have Nightwing in a relationship with Harley Quinn, so things are definitely changing!
If you're interested in exploring these relationships further, I recommend reading some of the comics that feature them. It's a fun and complex love story!