Getting mad over little things all the time, like this?

Okay so my friend just texted me and asked if "I could PLEASE come to Hersheypark with them because they have a group of three going and need a fourth person." Almost all rollercoasters/rides are two seaters so each time, someone would have to ride alone. I feel like they're only asking me just for the rides purpose. So like if it were just the two of them, they wouldn't have asked me to come because they have an even number. But am I just overreacting? I think I am...? Idk. How would YOU personally feel????