I've only ever had two real "relationships" with women in my life so far and I'm 18 now.
The first was with a girl when I was 15-16 and that lasted just shy of a year; she was in love with me, but I don't feel like I was with her, or I lied to myself about loving her.We dated for about 6 months, until which point she pressured me into saying that I loved her - I lied, for whatever reason. I cared about her a lot, but it never reached the same level as it did with the second girl (a level I didn't think existed, quite frankly).
The second "relationship" was when I was 17 (4 months before I would become 18). Now, this is where your question becomes incredibly difficult for me to answer because this was not a real relationship to begin with - she had broken up with her long-time boyfriend (who she said treated her like crap and who she still loved) and our fling only lasted 3 months with it also beginning as a friends with benefits scenario, but changing when she said she'd only see me (still not as a boyfriend, however). Nonetheless, I feel like I felt more for her in the 3 months I got to be with her than I ever did with my actual girlfriend of nearly a year. I felt ridiculous levels of intimacy with her, connecting in a way I never have before, sharing my deepest thoughts and feelings only to be supported and seemingly have that difficult effort returned in kind. It was sexual too, however including no actual sex. I grew attached (as I believed so strongly that she had too) and it ended on bad terms when I kept pressing for something more substantial than the "not-a-relationship" that we had, and she told me she still loved her ex. After being offered to remain as friends with benefits, I ended it... It took me months to get over her. almost a year.
Anyway, in direct response to the question asked, I do believe I have been in true love, felt real love for another, and it was the most devastating emotional blow I've ever taken. I subsequently do not believe in "love" (only as a strong bond/feelings for others), and if recovery back to how I felt before the second girl (hopeful toward finding love and happiness) is possible, I have yet to recover from her.