This is a hard one, and I know it from personal experience. Your biological parent may not want to pursue a relationship with you at all. He or she may be happy with where they are in their life, and this new connection is just too difficult for them. I’m not saying don’t try to convince them gently, but if they tell you they don’t want to keep in contact with you, you will need to be able to accept their wishes and decide how you want to obtain your own closure. As time passes, it is possible they will change their mind and want to make some kind of connection on their terms. You can be open to that possibility and hope that day comes. That’s a position I find myself in with my biological father and half siblings. It’s not the ideal, but there is also always hope.