Priyanka,
It is a life's decision which you are making. So any decision that you are taking you alone would be responsible for that decision. So think a lot before taking any decision.
I am not inclined to give an opinion whether it is good or bad. These are very subjective and entirely personal decision.
I can tell you from the experience that I have seen with some of my friends who have gone for intercaste or interreligion marriages. Some of them have completed more than 25 years of marriage.. Some feel they should not have.. while some take it on their stride.
If you are belong to a very orthodox family and if you are brought up like that, you may find it difficult to adjust initially. As some others have pointed out especially in eating veg/ non veg etc.
Marriage itself is based on compromises. Both the husband and wife come from different families, different ways of upbringing, even if they belong to the same caste. It is not the case all the same caste marriages are successful. Again success of marriage is very subjective.
We need to appreciate that two people from different backgrounds will have differences in every thing. The effort is how to make it a life of happiness by arriving at a consensus.
Earlier days women were not financially independent. So they had to go by whatever their parents said, whether they liked the boy or not for marriage. That doesn't mean that arranged marriages are bad. I am only saying it from point of view of decision making.
The present generation parents are very broad minded and they take life as it comes. One of my friends brought up his daughter as a typical Brahmin girl, learning music, dance and very good at studies, etc. she went to USA and there met an American boy who is a Christian and they are married now and have a child also.
Therefore, there is nothing wrong or right in any decision in life. Only time can tell us whether we went in the right direction or not.
But the point that I want you to realise is that whatever decision you are taking you alone will be responsible as there is no point in blaming others. Having said that, life should be seen in a positive manner and hope that everything will be alright.
Pl discuss frankly with the boy whatever your concerns are regarding life after marriage. After that give some thoughts to yourself, then take a decision. Either way dont take a hasty decision. Give some time to think.
Believe in God ! All the Best ! God Bless!