Maybe she wanted to be more than friends and she got bored when you didn't make a move. Or maybe she really is busy and she just doesn't have the time or energy to do what she used to.
Oh... Then it seems like maybe she got worried that you were developing feelings and this is her nonconfrontational way of letting you down easy. Or she's busy.
Well, taking her at her word seems best. If she's being honest, then you can pick up where you left off when things cool down. If she's lying, then you don't need someone like that.
No she is not using you.
is she using you? Is there something your not telling us because I see nothing here that shows she is using you. I see a woman who decided after being with you a few times that she wasnt as interested in you as she thought she might be and has moved on. You need to do the same
She would have to pay attention to you to be using you. Obviously she's not interested in your company. Get over it. You might think you need an explanation, but the truth hurts, and you already know it, if you're honest with yourself.
ask her than guess just blurt everything out and if a slight hint she likes u , u if u like her too move in that direction just wondering won't help buddy