Am I right to fear boredom and complacently (contentment) within a relationhip say of 8 months?
depends on if you are happy with that person or not. maybe, not spend so much time together? see how that works. or go do something together that neither of you have ever done, and see where that gets you ^-^
but am I being insecure about fearing being content?
I dont see why you would feel the need to be insecure about contentment. Being happy isn't something that you should feel scared about. In fact, it should be something you seek. Talk to your boyfriend/girlfriend about it and confront them. See if the two of you can work it out. Don't feel scared about it, because I'm sure that it will turn out fine. Congratulations on having a relationship for 8 months! Good for you :D