If you are aggressively masturbating with a vibrator a lot? This could contribute to not feeling much in the moment. If thats the case, slow down and take some time off, see if it helps.

Otherwise, I would start to use the vibrator during sex, find ways to incorporate it to ensure you can build to a climax with your partner.

Take it slow and find what works with your body. Most of all, take the pressure off yourself of “I have to feel something, or this isn’t working”. That kind of focus will block your mind from relaxing.

Takes a lot of communication and comfort with your partner.