It takes time to know someone. I would say that you should keep an open mind to both possibilities that maybe she is, and maybe she isn't, the right girl for you. She seems like someone who is pretty good at coming up with excuses for herself. Also, it sounds like she was kind of testing you to see how tolerant you would be. Be prepared for this relationship to involve some mind games and see how it goes.

Ask yourself what it is about her that is the biggest attraction. We all get lonely when we are without a partner. Sometime the only thing a person offers is that they are better than having nobody at all. You don't want to build a life on that. Watch how she treats people and how she talks about people. See if she really has a good heart or if she is inclined to use people. Only time will tell you that. Sometimes people show their truest colors when they are bored. See how she handles boredom. It's part of life. If she tends to break commitments when she is bored, then you can't count on her. Sounds like you want to give and get sincere dedication. She may be just passing the time in whatever way feels most entertaining at the moment. Time will answer you your questions. The answer might be hurtful.