My partner pressures me into sexual acts. Is this abuse.

Pressuring you into sexual acts when you are clearly not comfortable performing them is definitely an unhealthy behavior, but whether this constitutes abuse depends on the type and degree of pressure your partner is putting on you. 

If your partner is putting moderate pressure on you and is constantly trying to convince you to engage in certain sexual acts, but his or her requests never become aggressive or intimidating, then you are certainly the victim of harassment but you cannot call it abuse.

On the other hand, if your partner is using extreme verbal pressure or is blackmailing or threatening you then you are definitely being abused. 

In a healthy relationship, your partner would respect the fact that you are not ready for certain sexual acts.

Also, in a healthy relationship, your partner would respect your right to choose what to do and when to do it. 

Pressuring you to do things you don’t feel comfortable doing is both selfish and disrespectful.

When it comes to sex, you have the right to proceed at your own speed. Your partner needs to respect that right.