Help.

Soo. I got a new job and I have been there for about 4 months now. I have been in a relationship for 5 months. I developed a crush on one of my co workers and I have been casually flirting with my coworker for a while. Last night he gave me his number and told me to meet him at the bar down the road from work. He had been drinking, but we got in my car. We had sex in my car. And like, I want a baby, and my boyfriend cant give me one, but I took plan b anyway just in case. I know it should be eating at my conscience but it's not, I wanna do it again... but I still love my boyfriend. I dont know what is wrong with me or what I should do.

Ps. My boyfriend had a vasectomy after he had his second kid with his ex. And he dosnt want more kids. I want to have at least 3 kids. I hope to have a baby within the next 2 years. And if he even considers 1 more it will be over 5 years. I love him. He is a really sweet guy, but it pulls at my heart because the 1 thing I want in life is to be a mother. And knowing that i wont be able to get my life goal and dreams from this relationship has been bringing me turmoil and i just dont know what to do. The relationship is good rn, but future thinking i get depressed. I just want my kids, i want to give birth to at least 3 children. I dont want to end things. We talked recently about moving in together. And he is going through a custody case with his ex. And he needs the support, but I cant just let it keep on happening considering that I feel really sad when even thinking of a future with him.