I find it very hard to make proper connections so you are not alone. I try to come across as friendly but often find only a few people actually take the time to chat back these days in the playground, park etc. Not sure if we are mentally too busy to entertain others at times or if the art of conversation is dying out. Perhaps try a class that is of interest to you, not your kids or your husband so you can meet people with similar interest. It won't be long before all the seasonal classes like wreath making are being advertised you could try something like that to ensure you get adult conversation that isn't based on comparing how well or not your kids have behaved etc.
Wish you all the luck in the world, being an adult isn't easy. X