Am 18 and with a 28 years guy in a relationship. We have been together nearly closer to a month now but what is intriguing me is the fact that I feel like I'm the only one having feelings in the relationship.
How? Well, am usually the one who has to extend him first, am usually the one who calls, he can spend a day without giving me a chat whereas I always wish him good day even when am occupied 24/24hours .
He has never told me any words of sympathy or compassion sucks as I appreciate youor like you for doing this or that, or I love this in you etc.
Does someone thinks sincerely that I should continue this relationship?
And, should I tell him how unhappy I am about never texting or calling me if oh don't do?
On the other hand, I have equally noticed am the one who usually ask important questions such as, how was your youth? What about your parents, how did you get into this or that, etc.
Really, should this continue or end?

I'd say that you have just answered your own question. Guess what I think based on what you say!

Of course 'nearly a month' is nothing. For all we know, he is still seeing or planning to see other women. You say nothing about how involved you two are. Maybe it's all one sided.

I'm a woman and even I can't stand inane contact throughout the day. That's another thing... I want time together to be something other than a continuation of a string of texts so boring that I"m ready to run screaming away.
Maybe he doesn't like them either, and you are incompatible from day one.

How have I answered my own question? And am gay guy not a woman.

It's been a month. Only a month. You two have different expectations as to where you should be after one month. Maybe he's the taking it slow type. I would assume at 28 he has more relationship experience than an 18 year old. I am all for the taking it slow approach to a relationship. You have to get to know him well before you make any commitments. Speed kills in a relationship so slow the truck down and just enjoy the time. You also don't have to be exclusive either after only a month.

You answered your own question by describing his faults in just a few sentences. You sound more expressive than he is. Sorry I assumed about gender. My response hasn't changed, however.

Should I Continue This Relationship?

What relationship? After 30 days unless you have an agreement, you are still acquaintances, and should just back up, and live your life and not build one around him. Here's a novel idea, let him call YOU. If he doesn't, then you will know you don't have a relationship to end.