Till now according to what I watched and read so far, yes, she really likes him (nearly loves him) and she is not toying him. Of course, it depends on Park Tae Joon (the author of the story) whether or not this will be a sincere Choi Bomi or not. Don't forget that it's a fiction (manhwa). But let's think of it as a real situation -- she likes his personality (maturity, hardworking, positiveness, respectful to parents...), so she doesn't care that much about his face and body (for example that he's not tall). Plus, I want to lay stress on the fact that, in reality, a person who works so hard and starts to do so many physical activities and sports (swimming, martial arts, etc.) will become at least a bit more handsome (better body look). Also Hobin got famous (online) and comparatively rich (in a developed country as South Korea). So, he's not a loser or something like this. There are more than enough reasons for Bomi to likes and loves him. Well, of course many of the nowadays females may say it's not enough and they're searching for a richer, taller, stronger, handsomer, etc.