Not ready

So i’ll be 29 in Aug of this year my fiancé will be 30. We’ve been dating for 11yrs now so im not sure if being that we basically grew up together that now it seems like he wants to to “live his life” I don’t understand he gave me an engagement ring, didn’t really put much effort on the proposal but its a nice ring he custom made it and he was really nervous to ask me and asked friends how he should ask me but i guess it was too much pressure. And now im 6weeks pregnant and he seemed happy but now he’s being weird i asked him to communicate with me and he doesn’t. He went out drinking last night after work for a bday of one of his female worker and we had plans that night and he canceled on me and he hasn’t bother to text me we don’t live together and whats bothering me even more is that in our argument he said that i wanted this, the pregnancy not him. He’s always choosing other people and friends over me is he use to me? Maybe he doesn’t love me anymore? Maybe he feels he should settle with me and thats why he gave me the ring? I don’t think he’s ready. I didn’t think i would be going through this. Im so heart broken 😢💔Should i give him time or just walk away and be a single mom.