His new weird behaviour?

I dont know why this is bothering me so much, but my boyfriend has all of a sudden started speaking a lot more and making jokes with lots of women he met before we started dating.. we've been together for almost three years but are currently going through a rough patch (he just started distancing himself from me because he's having a rough time getting his life together because he's trying to start up his own business)... He will barely give me any attention anymore or want to take me out and stuff, I have tried being patient and asking whats wrong (besides the business situation because he wont speak to me about that anymore) but it doesnt seem to help... What should I do? Is there any hope?