Is it possible to be forgiven by God for your sins if you never repent?

 

No (Eze 18:30-32; Ac 17:30). You need the keys to the kingdom.

You need: to be broken, to mourn, to be meek, to hunger and thirst for righteousness, etc. (
Matt. 5:3–12). If you've never come to that place--you've never made the turn that the prodigal son made--you're still far off.

See:

Sermon on the Mount by Bob Beltz

 

Is it possible to be forgiven by God for your sins if you never repent?