Yes, clearly your living situation displays a deal breaking situation for moving onto a lasting, relationship. No matter how convincing, the reasons are, you aren't truly available. Being a single parent is tough enough, never mind a live in ex.
I agree, with fraiser, about separate living situations is the only way.
However, if it's just intimacy you are seeking, there's other websites to find people willing to be with others that aren't quite available. Don't know the names of these sites, but I'm sure others may have an inkling.

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