Hello Amanjot,
Your 7th house is the most potent in your horoscope. This will result in a very happy and prosperous married life. Should you get a good matching horoscope it is all the best and that you will live with him till the end. Otherwise you could have multiple marriages though you will continue to be happy in married life. Whichever way it is you will have a flourishing marital bliss throughout your life. Mangal Dosha is not a dosha at all, it is a status resulting from the position of Mars in your horoscope. Mangal means good and how can it be a dosha? Your sexual potency is indicated by Mars.