AM COMPLETELY INSENSITIVE DURING SEX

Good morning guys!

I have been with my bf for more than one year now. Am sexually active since 7 months now. The problem is at the start I used to be sensitive to his kisses and all that when he was still trying to dis- virgin me. But as from the day he completely penetrated I became completely INSENSITIVE no matter the efforts he puts in. However I have to precise that I started masturbating about 4 months ago and I actually feel pleasure but with my bf no. The situation is worsening as time goes by.

What can I do about that?? I really wanna feel pleasure with him.