HiCustomer Thank you for asking your question on JustAnswer. By the way, it would help us to know:
-What are your ages?
-How long have you been dating?
-Could you explain your situation a little more?Thank you again for trusting us with your problem. Please reply as soon as possible so that we can finish answering your question.
No you should feel bad for asking, he isn't going to know you want him to go unless you ask him and if he says no just tell him that him refusing to support you while you were in pain really hurt your feelings. Just because he didn't hesitate to take his grandchild and didn't offer to go with you doesn't mean he cares any less for you, it's different when it's a child because they can not take care of themselves an adult can and that is probably why he didn't think to go with you because he figured you could handle it yourself. Even though it was an accident he may still feel bad about it and doesn't want to find out that he hurt you badly and feel even worse than he already does. Ask him to go with you and if he says no then tell him how you feel about his answer. Tell him you don't want to go alone and you would like for him to be there for moral support.
If you feel that he isn't being attentive enough for to your needs then maybe you should reconsider to continue seeing him. You need someone that is going to care about whether you are hurt or not and would jump at going with you to make sure you were okay especially if his horse play is what hurt your back you would think he would want to make sure you were okay. It seem like he isn't caring about you the way you want to be cared for and that should be one of the things to look for in a good and healthy relationship.