Girl problem that needs some advice.?

[Super]

I asked a girl to have dinner b4 a swing dance event she kinda invited me to. I asked her on facebook private message. It was kinda short notice though. She responded that night saying "... I am so sorry but had a meeting I forgot about had to attend and won't be able to go to the dance tonight " I was kinda bummed that night at the dance, but then realized she wouldn't lie to me. The next time I saw her like 5 days later...she said hi to me and later I sat down and we talked for about an hour with her sister also. She told me more about why she didn't go...but she never addressed the dinner invite. More time went on we hung out together me and her 2 sisters all day at a concert and a few other times we hung out also always with her sister's and once at her house with her family. I wanted to ask her about the dinner thing...I kept over thinking it and couldn't get her alone. Well we did spend time alone at the concert but I didn't ask then. I'm wondering if she was uncomfortable with me being at her family outing...her two sister's invited me she didn't and wasn't around to have a say in it. She wasn't flirting with me like she was with the other encounters. She talked to me, but not with the same engagement. She still at the house showed some interest when we talked and her mom seemed to pump her fist when she asked what I did for work. It was on the corner of my eye...and she has the same interest. So I finally got her phone number when I asked she turned reddish in the face and when telling me the number became flustered stumbling to get it out. Is that a good sign? Well I called and asked her to dinner...she called back 10 days later saying she likes hanging with me and talking with me but only with her sisters or a group and as friends not one on one or dinner. Wow I was shocked. I can't put everything on her that happened, but she did have interest in me. Now after the first time I asked her to dinner afterwards we hung out and talked and had fun. I wish she would've told me that then!!! It was her move to respond but she didn't. Now I'm concerned she will be uncomfortable with me and hanging out with me. If so then there is something else going on...and she or her sister's must have the wrong idea of me or misunderstood me in something. Hopefully she'll be up front cause I'd like to still be friends...maybe I'm worrying too much cause she hasn't returned my second call. I only called cause when she called we only talked like 3 mins and I was at work. So I just had more to say to her that's all which is perfectly reasonable. I'm respectful of what she wants and I'm not gonna be asking why did you say this or that...just a response. So any thoughts. Why wouldn't she tell me this 3 mths ago when I first asked...act so comfortable and flirtatious with me then I call and ask and she's all just being friends and hanging out? Should I apologize for asking her out incase she is uncomfortable with me now? Thanks

[Alyssa]

Okay, honestly she personally seems to be showing interest in you. As a guy I wouldn't get too pushy/clingy/attiment about getting her alone right away. Right now for some reason she just doesn't want to spend one on one time. Maybe she isn't looking for a relationship and she knows that by going out with you it could turn into something and she is afraid of the outcome due to the simple fact that you are good friends with not only her but her family. You know what I mean? Anyways I say just give her a little space wait for her to get in touch with you no matter how hard that may seem..She will call you!! TRUST ME <3