Is it wrong to withhold sex?

Long story short... My boyfriend of 3 years drastically and suddenly changed the dynamic of our relationship. We went from spending everyday together, around his friends and family..to him literally only hitting me up at night time. We are 30. We've been together a long time.

Am I wrong to WITHHOLD SEX from him to get my needs met emotionally? We do not have in depth conversations. he has always been emotionally distant. But dang. I can't do this bootycall sh*t anymore. Been together too long for that.