<human>: So my current SO and I go pretty far back. I liked her a lot when she worked at the same food joint. She has a boyfriend at the time, but knew I was interested. Fast forward a year when we have both moved on from that job. She had just broken up with her then boyfriend,and I had asked her to hang out. We ended up making out one night. Things escalated from there and she ended up taking my virginity. We dated for a little under a year, and found that we weren't very compatible. I ended the relationship. She says she took it pretty hard, and I did as well. Some shitty things were done in between, but I'm trying to forget that. Here's what's throwing me. She started texting me after we broke up after a month or so. I decided to hang out and we ended up dating again. Through doing this, though, some weird things are going on with her. She won't let me meet her parents, even after knowing her for so long. And I came to find out that while we weren't together, she had gone on two separate vacations with her ex (?). One to Cancun and one to her sisters wedding. She won't tell me anything that happened and claims that they weren't dating. Now it doesn't bother me that she dated him again. I just don't know why she would take so much time to avoid the topic and lie to me about it. I think that something might still be going on and it's driving me nuts. I adore her but I can't get rid of this feeling that something is going on. It's making me a nervous wreck and I don't know how to ask her about it, after several failed attempts.

Could you distill the essence of the text into 1-3 sentences?
<bot>: my current SO is hiding the fact that she dated her ex between us dating, and is seemingly hiding our current relationship from her family.