Romantic love implies sexual attraction. That's where the word 'love' comes from. Qunari would be capable of feeling romantic love without 'doing the do', but not if they didn't feel attracted to each other. The same goes for everyone.
Etymology-wise you're correct, but you're also being deliberately obtuse if you think etymology=correct definition always. Also, you're only correct in English. Also, your logic means I totes want to frick my family which is ew.
Love has exactly 0 to do with sex. Hell, sex has very little to do with attraction since there are different types of attraction. Since the majority of people are sexual, though, the two get conflated. But 'majority' is by no means 'all'. People fall in love without feeling sexual attraction. People can feel sexual attraction without acting on it.
Frankly, it's the assumption that acting on sexual attraction is an absolute must is quite disturbing, since it's nearly inevitable that if you feel sexual attraction, you're going to feel it for someone who's just not interested. We (including fictional sapient species in this I guess) aren't freakin' bonobos. Self-control, one of the MAIN TENETS of the Qun if fact (!), exists.