The nature of the Eucharist is such that when we celebrate it, we celebrate it in community as community. It is called ‘Communion’ for a reason- not only are we in communion with God but with the other members of the community of faith, the Church.
You may well eat a cracker or a piece of bread and drink a bit of wine or juice or whatever in your living room, but it isn’t Communion you’ve had. It’s a snack.
The theological function of the Eucharist is the communal remembrance of Christ’s sacrifice with other believers. It cannot, I repeat cannot be celebrated alone. To do so is to deny the essential meaning of the celebration.
If two or three (or more) aren’t gathered together, Jesus isn’t there either, regardless of what Hipster Pastor says.