Everything about Eva Braun and Hitler's relationship suggests a love match.

They met in 1929 while Hitler was a leader of a minor party, and thus not terribly important. The Nazis only got 2.6% of the vote in 1928. They didn't get romantically involved until after the 1932 election, so at that point Hitler was clearly a powerful politician. But friends indicated that she had been trying to get his attention before that. She even went so far as to make a suicide attempt to catch his eye. She also had a second suicide attempt later when she thought Hitler wasn't giving her enough attention. She didn't fall in love with the successful politician. She fell in love with the guy on the fringe.

While they were together, Hitler wanted to present himself as a single man, so they never presented themselves as together in public. Most Germans weren't aware of the relationship. She didn't even attend official functions until her sister married one of Hitler's staff officers. After that she could attend as her sister's guest. So while the top party members were aware of her, she wasn't getting a lot of fame. Likewise, while she was a frequent "guest" at Hitler's residences and even occasionally played hostess, she never officially lived with him and continued to work as a photography assistant. So while quite comfortable, her connection to Hitler didn't exactly make her mega-rich either.

In the end when it was suggested she go into hiding after the war her response was, "Do you think I would let him die alone? I will stay with him up until the last moment." And then one day after they were finally officially married she committed suicide with her husband. So she in the end was willing to die rather than live without him. It's possible that those earlier suicide attempts were serious, and she would have rather died than live without her Adolf.

Now as far as being in love with a genocidal dictator. There's not much to suggest that she was aware of that side to him. She never appeared interested in politics. She never attended government meetings with Hitler. Her boss even called her "inconsequential and feather-brained." It seems likely she wasn't at all aware of the dirty sides of Nazi Germany. And even if she did... it's possible she was vapid enough that she wouldn't have cared.

If you're interested in her, I would suggest Heike Görtemaker's Eva Braun: Life with Hitler as a good biography.