Well guys I think you're overreacting, I'm sure she doesn't say "I love you" THAT way but of course for out poor Adachi is not so easy, plus it makes Adachi get more on the offensive! but of course, I would LOOOOOOOOOOVEEEEEEEEE to see a different character with a proper date next time, but being interrupted like this is very common in manga.
Also omg Shimura is dense like a proper romance MC too .-.)