+1 to what everyone else has said. Believe in yourself! The pace you ride is the pace you ride, it's not "good" or "bad." Sending you confidence-building thoughts and hoping that soon you either find someone supportive to ride with, or find great joy in riding solo.

Another confidence builder will be for you to learn to fix a flat tire. Those sealant/inflater cans leave a gooey mess - a waste of a perfectly repairable tube. Plus, it's a lot to carry, and one use only. Fixing a flat is easy once you learn how.