Would you wanna marry the only girl you ever loved/dated?

My boyfriend and I have been dating for 1 year and a half. I moved in with him and everything has been fantastic (knock on wood) but I have a doubt in my mind that he might wanna be with someone else and not marry me cause I’m the only girl he ever dated. We also dated in high school for 5 years. He’s the one for me, but I don't know he’s only ever really had one night stands.
Would you wanna marry the only girl you ever loved/dated?
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