Phone number

Just want to jump right in to it... I was out with my friend and 2 of her orher friends were there I tried breaking the ice and inviting them both to hang out another time at the end so one friend gave me her number the other one said she was going fo give me her number took my phone to add it and gave it back...

Today I was going through my phone and noticed she only added her first and last name. I'm not sure what to think?

If she didn't want to give me her number so I can plan to hang out all of us again... why take my phone to add just her name ?

My friend is the mutual friend so I was thinking of talking to her about it but im not sure

I feel hurt. I've never done anything to this girl.

Also This was in late January. Not recently that I went out.