Johnny ! Bad boy.
First marathon should be great mathschick. Mine was ! Very emotional.
Takes a lot of time & effort, and need OH to support you. Mine did, lots.
Put the effort in, you'll love it. Maybe make your long training runs an event, food the night before, breakfast or lunch out after, if Saturday or Sunday. chat, talk, chill, involve him.
To be honest, your OH is jealous... He doesn't exercise I guess?