Are your parents muslims? If yes then I don't understand why your Islam doesn't matter to them.
I will share a hadith inshaAllah that will show you why it matters when it comes to marriage, yours and your future wife's.
As for the girl who rejected you, praise Allah that she rejected you.
You are not supposed to enter haram relationship anyway, so praise Allah that she rejected.
Make tawbah and guard yourself from temptation of zina.
edit: found the hadith : Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said, “If someone proposes marriage to you whose religion and character satisfies you, then you should accept it. If you do not do so, there will be trials on the earth and the spread of corruption.” at-Tirmidhī 1084, Ibn Majah 1967
https://islamqa.info/en/answers/6996...ings-difficult
But this evildoing does not put him beyond the pale of Islam, so it is permissible for him to marry a Muslim woman, but someone else who adheres to Islam and is of an upright character would be better than him, even if he is less wealthy and of a lesser lineage, as it says in the hadeeth: “If there comes to you one with whose character and religious commitment you are pleased, then give (your daughter or female relative under your care) to him in marriage.” They said: “O Messenger of Allaah, even if he falls short with regard to wealth and compatibility.” He said: “If there comes to you one with whose character and religious commitment you are pleased, then give (your daughter or female relative under your care) to him in marriage” three times. Narrated by al-Tirmidhi. And it is proven in al-Saheehayn and elsewhere from the hadeeth of Abu Hurayrah that the Prophet (peace and blessings of Allaah be upon him) said: “Women may be married for four things: their wealth, their lineage, their beauty and their religious commitment. Choose the one who is religiously-committed, may your hands be rubbed with dust (may your prosper).”
These two ahaadeeth indicate that the best things to pay attention to are religious commitment and good character in both the man and the woman.