Do you think that`s clever being in serious relationship with someone if you`re less than 28 ??

HMMMM all couples i see around me ,in love bla bla bla are nice for 2 years maybe 3 and some 4 , then boom!!!! Look around you , see how many young couples who pretend to be in love and who pretend having found the perfect one , try to kill each other after around 4 years , or stay together just cause they are extremely attached or are afraid of being hurt if the other one leave them and find another partner or decides to sleep with new people. Attachement , is that all that remains finally ??