Questions: Religion & Spirituality

I am thinking of becoming a nun since there is no way I will ever fall in love with anyone. I am a very devoted Christian and serving my Jesus is a good decision.
But I still crave having children.
And I am going to use libido decreasing supplements as maturation is a sin especially for nuns.

I guess this is more of a philosophical question than a religious or spiritual one. But do you think some of us were meant to be unhappy or miserable and endure certain hardships for some reason? Religion and spirituality talk a lot about trials in life and overcoming them. But are some of us NOT meant to overcome?

I have been pondering this question for a long time because I look back at my life and, while I definitely haven't had it as hard as others, it hasn't been overly easy. I can't find a good paying job despite having a college degree. I have bi-polar disorder which has wreaked havoc on my life in so many ways that I'd have to write a MyTake or two just to go into detail. I don't have a good relationship. I live with my parents. And on top of that, I'm 27. I have nothing going for me. But I still get up, continue sending out hundreds of resumes and trying to find a purpose.

But I look at all of my friends who have kids and happy marriages, houses, great jobs and careers, tons of friends, and genuinely enjoy life. It's like they get what they want but I don't. In fact, they have the things that I want. And I'm beginning to believe that maybe that life just wasn't meant for me. What's more frustrating is that the things they have doesn't seem like they worked too hard for it if at all. I could be wrong because I'm not them, but dating wasn't hard for them nor was finding a job they love. For me it's like finding a needle at the bottom of the ocean.

I'm not trying to write a sob story, but I also know that many of these friends would not be able to handle a lot of the things I have to such as my mental disorder or being lonely or single all the time. They have problems, but many of them are petty ones like a co-worker who doesn't like them or having to sit in traffic for an extra hour.

But otherwise, they genuinely love their life. So are some of us just supposed to be miserable for some odd reason?

just curious, please don't take this question in an insulting way because some people will take it the wrong way. plus, I'm not gonna kill you and force you to come to my religion if your religion is not the same as mine...

oh and by the way, my religion is christianity lol :D