As a perpetually unhappy single person, you want to know what probably upsets me more than the status itself? People telling me I should be happy being independent. Ignoring how I feel on the matter. As if I'd need to sacrifice independence in a relationship. The condescension is insulting.
I don't think anyone (here) is telling you that you "should" be happy being independent. But what I see here is a little contradictory. You are single and independent and unhappy about it, but then you go on to say "as if I'd need to sacrifice independence..." as if you value independence.
In a relationship you DO sacrifice independence. Healthy boundaries say that you are responsible FOR yourself (including your own happiness), but you are responsible TO others. That includes your partner. If you have a partner, you can't just go on living your life as though you don't have one.
I might venture to suggest that your perpetual unhappiness with your marital status is likely what is keeping you in that situation. If you ever would like to work on that, try a CBT therapist who can help you get to the core of how you are contributing to your own situation.
While you might have good intentions, you're actually doing more harm than good by invalidating the importance of a relationship through such affirmations.
People are naturally, instinctually driven to seek out relationships. People might be saying some harmful things, but when they do, it might be a good time to open up some real, intimate, heart-to-heart discussions about what they are saying, about empathy, and about their intentions, which are probably good even if they hurt. Years ago my partner died, and people would come up and say "he's not in pain anymore" or "he's in a better place". These comments were well-intended, spoke to the idea that they were uncomfortable with my pain, they cared about me because they wanted to make me feel better, and didn't know what else they could say. But rather than focus on the words, I focused on the intent. I wasn't going to let their painful words rain on my grief! It's the same with you and your relationship status. Rather than focus on the words, try focusing on the intent behind them. That is, they are trying to help you by showing you what could change to start drawing people to you. I don't know you, so being happy might be one of them. I will tell you that most women want someone who is content, confident, positive, optimistic, fun, and good company, a best friend. Let me ask you: are you your own best friend? Would you want to be best friends with you?
As for replying to this thread, I have to say that I'm finding the discussion interesting as it's making me think more outside my own little box, as will happen when discussions take place when there are differing opinions. Life would be really boring if you limit it to only people who agree with you all the time. People can disagree and still have wonderful conversations and agree to disagree if the point isn't about winning or changing someone else's mind. If the point is simply stimulating conversation and critical thinking, then it's worth it! Case in point: I used to belong to a discussion forum years ago and would "have it out" with one of the members there. There were about 3 conversations that we totally disagreed on (one of which was boundaries), but those conversations were amazing and difficult and challenging and stimulating. Back then he was my sworn enemy. But I was in college taking a course in stats, and it just so happened he was a stats professor in a different country. He offered me to ask him anything and he would help me through it. If it weren't for him, I would never have passed. Because of his gesture, I had a whole new take on him and have very fond memories of our discussions and his tutoring me. So don't discount discussions like this one and turn it into a stimulating conversation where you and all of us can think outside the box, see it from all sides, and increase understanding rather than decide if we agree or not and leave it at that.