Hi midget....I can only guess that by "blending, in" you do NOT mean, "getting along with." I do quite easily find it no problem at all, to get along with most people/groups I come in contact with, or am associated with.
However....to "blend in," IMO, would suggest to be "like and/or similar" to others.
I'm confident I am able to blend in just enough to be comfortable and hopefully, help people to be comfortable around me.......However, I would not go to the extreme of attempting to be so much like those around me that I am behaving like and.or attesting to beliefs and opinions, I most definitely do not agree with. In other words.....I will blend, but I will not BEND my basic core beliefs.