Love this Pisces girl - How to tell her???

There is another conundrum. This pisces girl I like ALWAYS used to share her problems with me. Even when I felt she isnt telling much and I asked her,she would just come clean and pour her heart out. Now since last 2 weeks, I see her being all sad again and Ive tried everything to ask her what is happening and she isnt telling anything.
Not just this, She was sort of ignoring me and since past 2 days, she is talking again in university except she ONLY talks to me in our group of friends, yet tries to maintain some distance from me as well.
She broke up sometime ago, could this be the after effects of THAT or maybe she has fallen for me too ? i have NO idea tbh.