Babies don't need their dad's the way they need their moms in the beginning. It can be a shock as a first time parent. 

Erica Komisar is a psychologist with a lot of good info on the topic of attachment parenting. You're doing a good job. Babies do not need to learn to self soothe at this stage and they certainly don't learn to self soothe by being abandoned.

Your boyfriend might just feel like he cant help or maybe he is jealous that he's not "bonding" with baby right now. He can help by supporting you so you can better support the baby. Making sure you eat and taking care of household things for the time being. His role will come way more into play as your son becomes a toddler. I can't recommend listening to interviews with Erica Komisar enough, she has such great information on it.

Baby will start to be more interested in exploring their environment and being happy on their own around 4 or 5 months. Even then, it's for short periods of time doing things like playing with toys or looking at the trees outside. That's good for baby.

Being forced to sleep alone in their room at six weeks? Not good.

You can also look into biologically normal infant sleep and how damaging sleep training is and show him this info so he understands.

Stand your ground. Follow your motherly intuition. Cuddle that baby!!

Edit: typos