The words in your question show that you know astrology.
You wrote that you are not able to accept the alliances of
girls as their horoscopes have got big dosha(negativity).
When you can see the dosha of horoscopes of girls,you must
be knowing the dosha of your horoscope.
Your lagna is Kumbha.
Now you are running Guru period till 2021.
Kuja is with Guru in 2nd house.Kuja is neecha in navamsa.
Guru is spoiled.
So also Sukra is spoiled.Sukra is Sani in 5th house.
Sukra is with neecha Sani in navamsa.
You have to do penance for one year. firstname.lastname@example.org