The good thing about this is that you've obviously put a lot of thought into the subject. Another good thing is that you chose to rhyme couplets, and you've managed it without any really glaring forced rhymes, which is a good achievement in itself (though did you mean "reject" rater than "deject" which makes little sense?). So in summary it's clearly good writing in the sense of technique and message; certainly nothing to be ashamed of .
What it lacks imv is fire. The fire of uniqueness specifically. You chose to write about loneliness and the ambiguities of that very human condition, and you sure as heck did that. You wrote about it very directly but in quite an abstract fashion. There is no feeling in the poem that the speaker is in any way really involved or bothered about loneliness. It reads like a competent statement of the situation of humanity vis a vis loneliness, but it doesn't inspire me to belief. I'm a great believer in saying stuff like this in an indirect yet more personal way; a way that uses intimacy to inform universality - do you get what I mean by that?
And this impacts on the title too. Because the poem itself is so direct and impersonal it's pretty difficult to see any title except one such as "solitude" as anything other than a bit pretentious. Far better imv to write a poem that's more personal and indirect and then a append a more direct title.
Please don't misunderstand, this is very competent writing indeed, but like some other poets in this forum, you have the ability to move on. I'm sure I asked you this before, but what contemporary poets are you reading right now?