4 year old has no friends to invite to birthday

I feel so guilty. I know the pandemic was an excuse to not make any new friends. But still.. My son has 2 sisters and he always plays with them. They're basically best friends with his siblings. He is lucky at least to not be an only child in this pandemic but still now we have no one to invite to his birthday except maybe grandparents. He will be 5 beginning of September which makes it at a awkward time of the year where he hasn't met his classmates yet and hasn't formed friendships. I'm really nervous if he'll make any friends in kindergarten so that way I can try to keep in contact with their parents over the summer so I can invite their kids to his next birthday. Ugh I feel so much anxiety. I Hate parties and makes me more guilty I can't make it fancy with lots of kids for them. I don't even remember my own birthday parties as a small child.. I know lots are in same situation cuz of covid but i guess I just need to hear it from someone that it's not weird to just have a party with just our family via /r/Parenting https://ift.tt/3souXAH