I believe it's a matter of degree. There have been some folk who have become sort of addicted to BB. One person was told by her psychiatrist to stop writing here. Though I think it was more because it interfered with her therapy.
I very much doubt this is you. You have received heaps of help and support here according to you. No one has tried to be your psychiatrist or psychologist. We have all talked about our own experiences, what helps, what doesn't etc. You have been accepted here without judgement and I think this has been great for you.
You have also given words of encouragement to others and that takes a lot of doing at times. It is good for all of us to consider how to help someone else and it makes us feel good.
You have practised telling others about your difficulties and this has helped you to talk to your husband, no mean feat. Your psych will discuss with you if he/she thinks you are spending too much time here. There are times when we cannot answer a post for all sorts of reasons. Speaking personally, I sometimes read a post, realise it is upsetting for me and move on. You are able to do the same.
I think it is less likely you will take the concerns of others to heart too much. We are more likely to become too engaged when we meet with someone physically and often. There is an element of comfort in being physically in the presence of another person that is not available here. We also do not have usual type of conversations here. It is often several days before we can give or receive an answer, totally different to meeting for a chat and coffee.
I know I get concerned about the people I know. Doesn't mean I am not concerned for the people on BB. It is different. If we are tired, upset, having a bad day at home we will make ourselves get up and meet with others. Here we can leave the answers for a short while because here there are others to take up the slack, so to speak.
In short, this is a family which cares about all its members.
Just returned home and discovered I had not posted this or switched my computer off. Yeah.