Does he deserve me telling him this?

[Taylor]

So I have been seeing this guy for like wile now. We really like each other at least I thought he did. He was being a jerk and stopped talking to me out of the blue after we had sex, this wasn't the first time we've had sex so i know he didn't just stop talking to me because of that but its the first time we had sex unprotected. i know its stupid and i understand the consequences unprotected sex can have but it just happened and we didn't really think about it. So I've been really busy with school and everything (I'm 17 by the way and hes 19, in my country its legal) and I didn't notice that I'm 4 weeks late. I took a pregnancy test and it read positive. I'm going to go to my doctor on Monday to find out if its actually correct. So I was just wondering if i should let him know or does he deserve me telling him? I want to because I don't think its fair for him not to know but every message i send him he just reads it and doesn't reply. If you guys think I should could you tell me what to say cause i want to meet up with him and tell him to his face not off texting or social media.
(I'm really sorry about my punctuation.)