I made fliers for a project I was doing, but she did not put the fliers up?

She kept them in her room. There's this apartment complex she goes to often and I asked her, since she goes there often could she put the fliers up. She said she doesn't go there often. Okay, taking her word...Now another project has come up and she puts fliers at the same apartment complex she doesn't go to often and the computer lab. Basically, she went out her way to put the fliers up for that project and not mine and we are in the same group. i should have put them up myself but i don't go to this complex and she does. Should I stay in this group? I feel that I'm being lied to, disrespected (talking behind my back), not included in anything or properly informed, I feel like I'm doing the work by myself, and the others are working with eachother ,things are being pasted off to me and i've been thinking i made a mistake joining them. should i stay or should i go? I feel like I'm not benefiting at all but it's a decision I made to follow my heart. I'm happy with the decision not group