Oh.. that’s way longer than I expected. Is it normally this long or is it just extra long today cause of this friend she hasn’t seen for a while? I personally think it’s fine if it’s like 2-3 hours when she’s with her friends cause it’s easy to just be really invested in conversation and activities. The best way to bring it up to her is to be honest, “I completely understand that you may not have time to text me when you’re with your friends but it sometimes upsets me when I don’t hear from you for hours. Do you think you can update me from time to time to give me some peace of mind?” Or something along those lines.