Anyone else feel lonely?

Nobody ever told me motherhood would be lonely.im 23 have a 5 month old..he's hitting all his milestones but im introverted. I take him to play group so he can feel what it's like to know others his age..I personally think he is doing so well..yet today I was so nervous..I text all the mom's I have connected so far on the app but Nobody has got back to me or they see it and don't reply..my mom lives in Wales.. my dad honestly I have given him the idea to meet and go to playgroup yet he's like 'oh im working ' I just feel lonely i don't have any mom's friends that can relate to me