Unless you have a super dooper read on the raiser T8s probably isn't worth protecting.

What about the 4 of diamonds scared you on the turn? If your hand was ahead on the flop it is still ahead here.

3 to a straight on the river may be a calling situation but probably not too bad.

On the whole, you should have folded pre-flop. What do you think he is stealing with that you beat? T8o?