Ummm how is Shadowheart asking my female PC to have a drink with her sexual harrasment? Everything else really depends on the answer - which you control, so I really fail to see how the OPTION of romancing same sex character=harrasment
Have you never been hit on by same sex person IRL? Or someone you weren't even a bit interested in? It's the same here, you can simply say no and let other people enjoy whatever the hell they want.