This is a topic that comes to mind to most people at a certain time of discussion. Well using the pointers i will give, you can answer the question yourself.

1. are you both financially stable? Getting married is not about money to go and watch movies or money to buy chicken and chips, it takes a lot more than that. once married all the financially burden falls on the couples. no more dads money. so analyse both your incomes to see if it would be enough to live comfortably(feeding, housing, a bit of social life)

2. are you both emotionally matured? i hear some peeps say 21 is too young to get married but you may find out that the person is emotionally matured to get married cuz he/she has been thru a lot being a teenager and can deal with the issues marriage brings and this can be the direct opposite for an older person who has always relied on his/her parent for every difficult situation. Once you get married a lot of difficulty will come with it and you will not have any1 to help you deal with it only yourself. the couple need to be able to deal with very difficult emotional situation which cannot be avoided. Avoiding difficult situations usually crumbles the marriage.

3. are you ready to compromise in the marriage? this is one of the most important point. giving up what you love best(clubbing, hours on the phone with your bestfriend or any other thing) just to make things work is compromise. Many failing marriages always lack this as one party is never willing to compromise. Truly being in love would bring natural compromise and this should be a give and take situation. but compromising doesnt mean just putting up with your partner to avoid argument, compromise should be done as a act of kindness and love and should bring happiness.

4. likes and dislikes? he like watching football and she likes watch keeping up with the kardashains. can you guys accepts each other likes without being in unbearable pain?he leaves stuff everywhere and she take hours in the bathroom. can you accept this dislikes? this point goes hand in hand with the point mentioned above that once you can compromise and allow him watch his football or vice versa that things will go much better. Adjusting to his likes and her dislikes would help to achieving a successful marriage.

based on the points mentioned above you can decide the right age to get married. if by 21 you bear the characteristics mentioned then go ahead. on the other hand if by 35 you are not financially stable, quarrel with your girlfriend about everything and hate everything she does, then maybe priesthood is for you.