Could be your abiltiels are growing, could be a strong energy exchange, could be alot of things The two things I would pay close attention to is whether or not it starts happening more frequently or of it's a once in a blue thing and the details of the vision. If you are just starting to date someone and you were wondering if she is one the one, by getting a glimpse of the future could tell you whether or not she is compatible or whether or not it's a future that doesn't include you. Sometimes these things have a reason and sometimes it's just a strong connection so we picked up on it because we are wide open
As empaths we are most connected to those we care the most about. If you saw something, whether it was past or future, it was because you care about her. It does mean your powers are growing. It doesn't mean though you are supposed to do anything with the information however. Knowing doesn't always mean interfering. Sometimes that can do more harm than good. What will be will be and past or future you cannot change the outcome.