A Republican Maryland politician says legislators who voted for the state’s same-sex marriage bill contributed to his alcohol abuse.

Republican Delegate Don Dwyer told the Maryland Gazette that he felt “betrayed” when his colleagues in February of last year backed the measure that Governor Martin O’Malley eventually signed into law.

“That betrayal really affected me,” Dwyer added. “I was physically ill. You pour your heart into an issue like that and it’s devastating.”

Maryland Natural Resource Police last month charged Dwyer, 54, with operating a vehicle while under the influence of alcohol, reckless and negligent operation of a vessel, failing to register his boat and rules-of-the-road violation in connection with an incident in August that left him, two other adults and four children injured.

Following a public referendum in November of last year, the first same-sex marriages in Maryland took place at midnight on 1 January 2013.