Relationship help

Hey this is the only place I talk about my life as you can be anonymous and get advise.

I have known this lad my whole life are family’s are best friends anyways we’re always off and on and even when we’re off we sleep together.

My problem is when he’s asked by someone if he’s single he says yes which hurts my feelings

He’s always saying how amazing I am as am always there for him when he’s stressed/ upset etc

He’s stuff is still at my place as well but Sometimes when I message him I get ignored and I know he’s ignored it because I can see that he’s seen it and when he was last online.

I have been though so much with this guy not long ago I had a miscarriage and can’t stop thinking about it and what it would be like to be a family and happy.

How am I supposed to get Over someone I love ???