I met a girl about 2 weeks ago. On our first date we went to a cafe, talked for 3 hours, decent kino, at the end of the date we made out and it was great. She tells me to text her so we can hangout again sometime. We agree to last week. The day before the date, she texts me saying that an event came up for her and she couldn't make it so she asks if Saturday is a good day. No problem, I go on about my day. Saturday comes, she messages me again the day before the date and says that her grandma is doing her surgery so she can't make it, she says that after exams would be best. I tell her it's absolutely fine and I hope everything goes well. I'm not even sure when exams are over but I didn't ask, but the thing is that I don't know if it's a lack of interest or whatever. In her text she also said how she wanted to see me and she is extremely sorry.

What do you do in this situation? I'd like to add this girl to my rotation.