After analysing your chart, we can say that you have good and long lasting happy marriage.
The chances of you marrying someone chosen by your family are better than you marrying your girlfriend on your own. However things can be worked out after April 2022 when there is a favourable time of few months up to Oct 2022 during which you can take the initiative to convince your family about your girlfriend.
You will have a happy married life with good conjugal happiness.
Mithun Lagna with lagna lord in eighth house conjunct Venus and Sun; Saturn in the seventh house and seventh lord Jupiter in the twelfth house.
Seventh lord conjunct Moon and Ketu in the fourth house in the Navamsha; Jupiter transiting the natal Moon from April 2022.