Last string in your marital life is your child. When you feel detached from your daughter then other consideration hardly matters (because according to you your husband and his family is not good to you). On other hand you have some one and his family who understand and respect you, you should give serious thought to it (as you said he is reliable and honest). However, I will still insist you to think about your daughter one more time, as she is going to loose her mother. If you feel that she is going to be ok with her father and you will not miss her, go ahead.