So, are they together now? I don't really get that vibe.
As of right now, it's just subtext in that regard. We'll have to wait and see what the extra chapters bring. Given the tone of the ending, and honestly the manga as a whole, I don't really see it becoming explicit yuri.
Yes, this series has always been about the characters' feelings, with no suggestion of those feelings inevitably leading to a physical intimacy that would be depicted on-panel.
On the other hand, it's pretty clear from the flash-forward we've already been given that they're going to be same-sex life partners. Matsuri's plan for calling her partner "Miss Sunflower" during business hours but using her real name after hours already tells us that there's going to be "Miss Sunflower & Matsuri After Hours."
Miss Sunflower invited Matsuri to say her familiar refrain of "Miss Sunflower, I love you!" I will only be disappointed if we don't get a scene where Miss Sunflower replies, "I love you too."