Musings: Religion [1]

So, I'm going to be quite honest and transparent here. 
I've been doing some 'soul-searching'/reflecting on what it means to be a Christian. What does it mean to be set apart, yet not separate; to be in the world but not of the world. Or as Christian jargon would put it, to be "salt and light"; to be relevant yet righteous. 
And this question has been troubling me for quite a bit.
I guess, the deeper question that I was asking is, how am I living my life out as a Christian? What makes me different from any other person out there who isn't a believer? I honestly don't see any difference. To put it bluntly, I'd say I'm like an 'atheist leaning towards Christian values'. But that's not entirely accurate either, because I believe in God, and I have a relationship with Him. 
Okay. Maybe more like a 'theist leaning towards Christian values'. I've been wondering, if I'm gone from Monash, did I make a difference in anyone's life? Have I impacted the students there in any way? Would they miss me because I'm friendly, nice, helpful, etc, or would they miss me because there was something different in the way that I lived my life; because I made a difference in theirs? 
I don't know if I'm making sense here, I hope I am. 
Christians always talk about becoming a living testimony- something which I think I'm not. If I were to look at myself from another person's POV, I don't think I embody anything Christ-like. Maybe just a few values here and there.  I know that's where the whole "we are works in process" thing comes in, but I'm still not satisfied with the way I live my life. I feel something is wrong somewhere, but I just cannot place a finger as to exactly what is wrong. 
Maybe I'm concerned. Maybe I'm concerned that I'm not that concerned about living a Christ-like life. Actually, I am, since I've been thinking about it. But I don't think I've been doing anything as to 'rectify' it. 
I've been thinking. What does it mean to be a Christian?
Does it mean that you go to church every weekend, go to CF, listen to Christian music, fellowship with Christians, read Christian books, blogging about Christian stuff, sounding holy, etc.
I wonder how non-Christians define us Christians. Does going to church make you any more a Christian than one who does not? 
Do you see where I'm going with all of this? I know the typical answer as to what it means to be a Christian is to be a follower/disciple of Christ. But again, what makes one a follower of Christ? I hear so many sermons about being so ready to lay down your life for Him; to let Him take the wheel of your life, etc. But how can a non-Christian tell the difference between him/her and a believer? 
I don't know. Sometimes I think we (myself included) spend too much time trying to appear 'Christian' that I think less of trying to be Christ-like.
Which brings me to another question: What does it mean to be Christ-like?
The most common answer would probably to be someone who 'loves their neighbours as themselves'. I look at Jesus' life. And I see something so common in all the Gospels- He spent most of his time with the 'untouchables'; tax collectors, prostitutes, diseased, etc. 
Translate that into modern day terms. I mean we certainly don't deal with tax collectors on a daily basis. But we certainly do bump into the less noticed, the less popular, the lonely, the less accepted, the handicapped. Maybe even the'sinners' (inverted commas because I think Christians nowadays tend to judge 'sin' by the 'weight' of it, instead of looking at sin as it is-sin); people who smoke, take drugs, appear gangster-ish. In fact, sometimes when I spend time with people like that, there's this nagging thought in my head that goes: "OMG. What if some CF-er/ church goer passes by at this moment and sees me with these people? What will they think of me? 
Come to think of it. I don't know why I had those thoughts in the first place. I mean, hello! It happened to Jesus too! With the Pharisees. 
As for the less noticed...I certainly have noticed them, but that has not spurred me to take any action. To genuinely know them and be friends with them. To have lunch with them or something. And that's why Rachel catches my attention every time. See, she hangs out with this girl with cerebral palsy called Jo Leen. Not that I avoid her, I just don't make an effort to look out for her. And to me, seeing Rachel walk slowly so that Jo Leen can walk at a comfortable pace makes me notice that something is different about Rachel. Because I see no one else making the same effort. And I truly see her passion for missions, and for God. She stands out, more than anyone else that I know, even in the CF. Not because she blogs about Christian stuff, and goes for mission trips, but. Something just radiates out you know? You can just tell something is different, because she has Jesus.
I don't know. I think I'm starting to become incoherent. And I still have not yet gained the answer to my question: What does it mean to be a Christian; to live a Christ-like life in today's world? Does it just mean to love as Christ did? 
p/s: Just random thoughts. I know I'm supposed to answer this question for myself, but I was just trying to make sense of things.pp/s: Note to self: Must make an effort when I notice people now!