When we will grow up?

Claiming to be live in modern society but do we really?
As once again I am starting to talk about friendship where the most common problem that really hurts is that there are always some jealous people who don’t like friendships between 2 people. And the problem becomes more prominent when they are become of opposite sex. Often they don’t say anything but you can feel the same in their gesture. That is just some orthodox and narrow-minded thinking of people about whom you can say that they will never grow up when considering such matters. So even though calling themselves modern people their thinking is still age old. And its not just people from small cities acts so but sometimes we the well educated people also thinks so, as seeing a guy or a gal together we started to talk about affairs etc stuff between them. And sometimes situation become so embarrassing that either people left red faced when come to know about the actual situation, or they let go the friendship that they share together just thinking that "log kya kahenge".
In many of such scenarios, situation become much more difficult for a gal who as some boys as a friend. Some families do support this but most of others other don’t. As some people are still living in some other era where it is socially not acceptable for people to talk to opposite sex (other than close relatives), let alone befriend them.
The situation is even more worse among people/families from small towns even though they are living in metros they still don’t take such friendship as easy. As usually you see/read/hear about cases of honor killing or sometimes a family pressurizing a gal to marry or anything like that. Can’t parents trust their kids even though they turned 20-25? Usually Whenever such cases surfaces even that of friendship let alone the affair families try to suppress the cases and let girl to get married ASAP and sometimes without even considering that prospect guy is good for her or not, and sometimes even let her go with the one who doesn’t fits at all. How can parents just abandon their child in such a manner whom they loved and took care for more than 20 years? Abandon is a hard word in such context but still the way they get her married is sometimes similar to abandoning her only. And after "abandoning" they feel so much relieved as a daily wage earner feels after getting money from a day's hard work. In such cases people don’t even bother to enquire what is right or wrong they just react on whatever they had heard, not even to ask their own child as what exactly is the correct version of the story that is floating around. Just like they trust some unknown rumormongers much more than their own child.
Similar is the situation when religion comes, and a main problematic case is of friendship of people of different cult and preferably a Hindu and a Muslim. Families just don’t support them and even discourage for such friendship. When I get into hostel and then into job I remember someone asking me that which caste my roomies belong to?
I really don’t understand if I don’t have any problem then what is problem with them. Why religion is taken as so seriously?
These are the scenarios where we really need to grow up.
So, when will we grow up?