How do I respond to this?

I'm a single parent to my 6 year old daughter. A work colleague said I was boring because I have no life because I don't go out drinking on a weekend.

I admit I do get lonely at times, and wish I had time for myself, but I don't have anyone to look after my daughter. So every weekend i plan places to take my daughter. I'm not in a position to have a life for myself. Her remarks have made me question how boring I am to be around.

How do I respond to this?
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