You have "blown" the head gasket, there's no question about that. It's also likely that you either warped the cylinder head or possibly cracked it but only a machine shop will be able to verify it.

No way to avoid pulling the head off if you're going to try and save it.

Liquid glass is a last resort, the only time you should consider using it is under duress. It is a temporary solution not a permanent fix.

If money is an issue, consider either a lower mileage used head or save up to have yours rebuilt.

Chances are the head gasket is leaking compression into different cylinders, or the crankcase. It could also have damaged the timing belt.