This is pathetic that I feel like I have to defend myself over something like this, but whatever.
Fandom is supposed to be fun, not something to fear. I cannot continue to be afraid to explore fictional relationships just because some people might find some of them offensive, merely by virtue of the genders involved. Same-sex romantic pairs are not inherently more sexual, more out-of-character, or less valid dynamics to explore than opposite-sex romantic pairs.
Also, slashing a character does not automatically "make them gay" or erase any explicit heterosexual tendencies that might be in the source material (though look again and you'll find many characters don't even have explicitly hetero moments at all). There are more orientations in the world than unbendingly straight and gay.
Which brings me to my next point.
This is why I cannot keep living in terror and self-loathing over even thinking
about anything the slightest bit non-hetero in fandom. I get plenty of that in the rest of my life. (Not that it's anyone's business, but since I'm feeling defensive, I'd like to point out that I am a virgin, and thanks to the aforementioned terror and self-loathing I likely always will be. In case you were worried about sins against my body or the fate of my dirty soul or whatever.)
So maybe I see a few characters being kind of like me, only maybe able to be happy.
In conclusion, I may still be shy about my slashy tendencies, but only for the reasons I may be shy about my het - that is, afraid to step on toes of other shippers. XD