Confused

So I've been "together" with this one girl for about 4 months. The only thing is we've actually seen each other once during that time outside of school. I haven't talked to her for 3 weeks or seen her in two months. I sent her a text and Facebook message that asked if she was fine because she didn't talk to me for a few days. She read both the text and Facebook message and didn't reply. Then a few days ago some family health problems came up with a relative. I went into a deep state of depression, though I'm still fairly depressed, and my ex was there for me. :boggled: We're pretty good friends now, initially after we broke up it was a bit rocky. We had some deep conversations like we used to. It was nice to feel a deep connection with somebody. Then me and the ex attended the same party a few days ago. She got really drunk and we were walking together and I asked her "Why do I feel so depressed?" and she said "Maybe you feel depressed because you've had a change in feelings." I don't really know what that meant, I think it was targeted towards old feelings we had. Later that night it was just me, her, and two of her close friends. One of the friends said something about sex, and she said "That sounds so good right now." She normally doesn't say stuff like this. I don't really have strong feelings for her now, because of the other girl I'm "with". I don't want to betray her because she did nothing wrong. But to be honest in just a few days of talking with the ex we've probably made a deeper connection than I have with the 4 months with the my "current girl". Though I don't even know if we're "together" anymore. Like I just feel distant from her to the point where if we broke up I'd feel nothing, where normally I'd feel a pain and regret. Any input is welcomed! :)

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