Why do I keep choosing things I don't actually want to do because I'm afraid I'll regret staying home?

I have a problem for a while now, I keep making choices I don't wanna do. Like on thursday I didn't wanna go with my mum and uncle to search for a bed for him but I still decided to go with them because I was afraid that it would regret it being at home, we were gone for 5-6 hours and I was exhausted and hungry. Now in the morning today my parents gonna drive to visit my grandpa and a friend for the weekend and I don't wanna go cause it's always boring for me and I just sit there and do nothing at my grandpa's home, but if I don't go with them I feel like I would regret the second they drive away. This happened often when my parents wanted to go shopping and I decided to come with them when they were just about to get in the car. I don't wanna do this again, I need your help getting rid of those weird decisions. I really hate it