This is an interesting topic... because "Do you love any of your ex-girlfriends" is a question I've been asked multiple times, and this isn't always a black and white issue.
I have...I'll say two ex-girlfriends whom I can claim with honesty that I love.
One, ended up liking girls more than guys, but she is so sweet that I just adore her - no matter what the form. And also, more than 10 years later, we've both acknowledged there is definitely no sexual chemistry left between us. I walk her home when she drinks too much, she gives me opinions on my newer girlfriends, I walk her dog, she gives me energy healings, etc. I truly love her.
Two, is a little closer to the warning zone. We were together for 11 months, and it ended four years ago. She said I wasn't giving her enough attention - which was true. I thought she was more interested in me for financial security and reputation purposes, than interested in me for me. She said she felt we were not long term compatible. I said I thought she didn't know how to support me in my long term dreams and goals. Both of us are in new relationships, that align much better to what each of us really want. I see pictures of her, and she is turning into somebody I don't recognize. We have different intentions, we're growing in different directions, and I would never go back to what we had. But, we ran into each other a year ago....and there's still feelings. I kind of wish there wasn't. Because I don't think we're good for each other, and both of us deserve better than that.
So, when I am asked that question, "Do you still love any of your exes," I give an honest answer, and it's taken as a yellow flag.