Need advice....

Me and my so have been together for 5 years

For the whole5 years I only came 3 times. (3times!?!?)

Anyways I recently found a way that could make me cum everytime.

Which is with a vibrator.

He has started to make comments like "what are we 14 again and you just discovered you could masterbate" and hasnt wanted to have sex with me.

Any idea on why he might be treating me this way?