They clearly love each other, you can tell just looking at them. They just don't choose fall in love, but at this point they already know that their choice was not respected, they are in love and falling over and over again.
Is it possible to fall in love with someone after only knowing them for two weeks? Steph had her heart broken by a man she thought loved her and hasn't given any guy the time of day since, so why is Chris Evans different?