She wants time to think... about what?

Hokay so this woman and I have been seeing each other for a little over a month. She's 27 I'm 19 (2 weeks from 20). We work together and weve talked every day for 2 months, used to text but for the past couple weeks we've been talking on the phone and we end up talking for at least an hour each time. couple nights ago she said I was too young for her (she's mentioned it before but I thought she was getting over it) and she says she really likes me and has feelings for me but it's always going to be an issue and she can't get over it so she needs time to think and decide if its worth trying for, we haven't been texting or calling me at all but we've talked a bit where I've told her my feelings and how if she really likes me shell stay with me and see how she feels about the age thing later on. There's 2 other possible factors here, the first is she's going out of the country for 7 days in 3 weeks. The other is we were getting serious and I think it was scaring her because she has issues with trust and vulnerability. I fell for her and I don't want to lose her. For age gap relationships does age REALLy matter honestly? Cause **** everything else is perfect, like were right for each other. She even said I was perfect for her. What can I say or do here to make this work for me?