wishing i could take a break from life ๐Ÿ’”๐Ÿ˜“

im laying here crying my eyes out after finding out my so of 4 years is cheating on me , well some girl kept commenting under his picture on ig like " babe ๐Ÿ™ƒ" " ๐Ÿ˜๐Ÿ˜๐Ÿ˜ " , i asked him he said he dosent know that girl i said okay well today i wake up to messages between them & apparently he's been sleeping at her house some nights when he's supposed to be at " work " & just the other day they was together at the vet .. she sent messages and pictures & i told her " thats my fiancรฉ , we have a child together " she replied with thiss .. 
I've never loved someone so much in my life but  im 22 weeks pregnant & I can't believe this is happening to me .. i blocked him on all social media & i texted him " I guess its a sign we just don't belong together huh ? ๐Ÿ˜“๐Ÿ’” " then i blocked him .. the more i cry the harder my son kicks me & i cry more because i feel so bad im feeling so suicidal .. i use to cut myself but he helped me alot & i stopped its been 3 years since i last cut & idk why i feel like life would be better if i wasn't here ๐Ÿ˜“ but i got my son & I can't do that to him it isn't his fault .. please can i get some advice? I just dk what to do or what to say to him .