Frankly, it sounds like you intimidate the heck out of guys.
I don't know your personal situation, or you personally [obviously], but I can somewhat relate to a couple things your are saying.

And... you can tell a man you like them, are fond of them, are attracted to them, want to see if something might happen down the line.
This is open and honest communication. If someone is getting mad at you for telling them you appreciate them more than others in your life- there is something wrong with THAT PERSON- not with you.

I find it a shame that, particularly in relationships [of all kinds], we are encouraged to deceive and manipulate our words, to hide what we are feeling, to cater to what we might think the other person expects.

Don't do this.
If you are suppressing behaviors that are natural and needs you find imperative, whatever relationship you are pursuing is not likely to turn out well.

As I said, I don't know your general MO in real life.

I think I tend to intimidate men because I am extremely giving and kind, but on the other hand- I'm not big into obfuscation or ********.

So while I will do pretty much anything for an individual I care about, I absolutely will announce when something is bothering me, or I feel is inappropriate.

As well, I tend to draw clear boundary lines for certain issues.

I'm just going to write the following, as even if i were to attempt to cushion the notion I would still get crap for it:
In my experience, there is often an expectation that men will "lead" and be balck and white, straight up, aware of what they want and be vocal.

The alternate expectation for women has often been that they would rather follow, that it is "nice" when they don't impose their desires- be it plans, or what to have for dinner, or even how to conduct a relationship in general.

So a lot of males routinely encounter wishy washy responses and interactions with females. This is not a blatant sweeping generality, but especially when younger women have difficulty reaching a point where what they say, want, need, establish as boundaries, are encouraged and appreciated.

At this point, I think for ME to have a good relationship it is essential to ask an say uncomfortable things- but that is seen as intimidating.

If it's so intimidating to have honesty, openness, and occasional necessary confrontation, that is not the man for me.

It's possible my read on this is completely out there, I feel like there's some element that I am hitting on though.