I’m a 27-year-old male seeking advice on understanding what she, a 26-year-old female, wants. Should I move on or not?

She mentioned that she wants to wait for me to find a new job in the summer. She expresses that she's happy being single, but she often suggests hanging out. We have a great time together and share many common interests. However, when we go out to eat or relax, she tends to be on her phone a lot. I've noticed that when I catch a glimpse of her messages, they sometimes come from guys I don't know, and they often include a lot of heart emojis or other flirty symbols. When I notice her phone, she often asks why I'm looking at it. Her phone is always face-up and visible when we talk. Interestingly, she mirrors my movements; for example, when I lean forward at the bar, she does the same almost immediately. We frequently make plans for future trips together, but there's no set timeline. I'm uncertain about her feelings—whether she's genuinely into me, sees me as a backup, or something else entirely. I could really use some advice. Thank you!