I boyfriend died an we were living together over 10 years can I collect his social security I am 62 years old

Absolutely NO. You are not his widow and cannot collect anything since he's dead. There is no common law marriage recognized now. Just living together is not going to get you any benefits. Had you been married that would be a totally different story.

Where do you live, common law marriage exists in at least 10 states but each state has rules about what constitutes common law marriage. How to Know if Your Common-Law Marriage Is Recognized

The Social Security Administration will only recognize your common-law marriage if the state where you reside recognizes your common-law marriage.

To make sure that you would be eligible for survivor benefits, you need to go to a SSA office and fill out forms, provide statements from two blood relatives, and provide supporting evidence of your common-law relationship.

That is from the link the Ballenger provided.