Can my boyfriend throw me out of the home we shared for 11+ years without an eviction notice

Did you ever file taxes jointly, or hold yourselves out as being married?  If so you could file for divorce with an Application for a Temporary Order to ease with your transition.  If there was no common law marriage you could refuse to leave but then he would most likely file for a "Forcible Entry and Detainer" which would direct the sheriff to remove you, at the hearing you could probably get some time, but ultimately you would have to get out.  Some people file for Victim Protective Orders, which can include an "eviction" of sorts, but in the absence of evidence of threats of imminent harm it would be an improper act to seek a VPO for the purpose of removing the other person. Just as in divorce cases, the best advice is often "don't fight over saving the 'relationship' because that is not something a court can help you with" if you negotiate for reimbursement of things you invested and move-on, in the end he will realize he made a huge mistake. Call a lawyer in your area to discuss any other details that may make a difference, co-mingling of finances is a bigger deal than just where you have been living.  Ask him for financial support to make moving possible, first and last month for an appartment, etc.