Hello, Joe90...I understand the "bittersweet" feeling...To be happy for those, while at the same time sad for that which you don't have...And no, it is NOT jealousy...
I know, because i attended many, many, many happy weddings in the course of my life-time...And i was genuinely happy for the couple...Yet, at the same time, i was sad for me...I always believed in love; i just did not believe that it existed for me...
With respect to pregnancy, at least it is your choice NOT to have children...I don't have that choice...You see, i met my beloved husband until my late 40's...(I had lost my reproductive organs at a young age, appx one decade before)...Still, i am grateful to God that i was a "Substitute Mom" to my beloved niece and my beloved nephew, when i helped in their upbringing for approximately one decade...I am beyond grateful to God also for my husband's children...At present-time, they do not live with us; but i remain hopeful...Have you considered adoption???...An autistic child, perhaps...???...Just a thought...Greetings from California...And have a blessed Sunday...

Can't adopt - in the UK they don't let you adopt unless you are very rich and under 25. Sadly, we're neither of those. My partner 20 years older than me and is unemployed.
And no disrespect to autistic people but I wouldn't want an autistic child.