Why won’t he say “I love you” despite planning a house together?

Been together a year, lived together almost a year. We've plans to buy a house together cause that's what he wants. He still hasn't said 'I love you.' i said it ages ago, I don't understand. I don't want to bring it up and make him say it because I asked. Surely buying a house a bigger commitment than saying 'I love you.'

Why won’t he say “I love you” despite planning a house together?
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