Correct, right now they can't communicate, with the time skip that's become even harder, but I see a golden opportunity with this movie, especially with Shinobu being both director and writer. Sakura's response to this misunderstanding was heavily influenced by several external factors and not just her own judgment. Remember the text she sent to the fuckboi all it said was confirming the cheating, so then why did fuckboi magically appear in front of her to effectively coerce her back to his place despite offering her the option of a taxi back home. Their feelings to me were genuine so I'd say Sakura was a serious partner to Shinobu.