I think, if you have been hanging out 3 times a week thereabouts, for 6 weeks and remained in the friends zone, with some kissing only then both of you have kept things at bay for your own reasons. His, perhaps from previous hurt and you from caring for your Father for so long.
Fear does amazing things.
But, think about it. When you meet someone, at some point "early" enough in the dating sides of things you really feel that lust coming on.
It could be that both of you needed and need each other as neither of you wish to hurt the other, what may come of that later who knows but you have something solid for now, so try to keep it.
It does sound though that your initial intentions stated to take it slow may also mean that you are frightened to allow someone into your life due to your past circumstances. It's hard for someone who isn't being shown lust, to perform in any fashion at such an early age of a relationship.
Are you ready to have a relationship? Be kind to yourself, it's your time to share and be happy.