You definitely do not have to spend Shabbos alone! Go to a friend’s house after licht bentching and shmooze.
If you live in an area with younger children, you could think of organizing some activity for them and be the madricha. My daughter is part of a shmiras haloshon kabbalos Shabbos program. She has a class from the local school a few grades below hers and they get together to say kabbalos Shabbos and she usually plays a game with them and learns a little about shmiras haloshon with them. Her class loves her and wants her to continue next year.
In the afternoon she helps out at a tehillim gathering for girls. They say tehillim together and someone could say a short story related to the parsha or some other topic of interest.
My other daughter is a madricha for Batya, which is like B’nos in America. They have an activity on Shabbos afternoon for a couple of hours.
It is so good for the younger kids to be busy (especially during the hours that their parents would like to take a nap) and doing something other than just playing.
If you live not far from friends, you could chip in together and buy a few games and spread them around to each others houses. Go over to one friend each week and play games over there.
Shabbos is a great time to relax without pressure of doing homework, going to school, being at school early in the morning, etc, etc. Part of it is looking at the cup as half-full (it’s really overflowing) but unfortunately it sounds like some of your friends look at it as empty, so we have to start somewhere.
Hatzlacha with finding ideas to increase Shabbos appreciation in your area. It’s a terrific idea.