Christan friend help?

I'm atheist and my friend is christan. She would like for me to go to the Wednesday night service every week. My mom would like it if i went to socialize and get out of the house more often and will not argue with my decision. I really don't know what to do, I feel like i may hurt her feelings if i say no and if i do go i'd feel uncomfortable but would be spending more time with her. I definatly don't plan to turn christan too. Do you think i should go and put up with it or not?