Since you don’t have a crystal ball, all you do is pay attention to what you DO know, and what you DO know is that you’re dating a woman who’s also dating another man. My suggestion to you is that rather than giving her all the power in the relationship, you decide your role in all of this.
You can try and win her over (read my book called Date Out of Your League, written for men, that you can purchase here [url]http://www.askapril.com/relationship-dating-advice/date-out-of-your-league.html[/url], and it will give you the secrets of how to win any woman over). Or, you can date her and continue to date other people, keeping your own search for Ms. Right, brewing. Or, you can decide that you’ve invested enough time in this woman and don’t want to be taken for granted and move on to find someone who wants to date you and only you.
Those are 3 options, and the choice of which option to pick is yours.
Let me know how they resonate with you. 🙂