My breasts are too close together... can this be fixed? 1 month post-op. (Photos)

Your breasts are naturally close together. This cannot be altered surgically. What can probably address your concerns is reducing the implant size, either with an implant with a narrower base width, or smaller volume, or both. Overall you have a very nice result and you should proceed with caution with consideration of revision surgery. If you remain displeased, downsizing is a fairly straightforward undertaking. I recommend you discuss this with your plastic surgeon. Best of luck to you. 

I am sorry to hear about your concerns after breast surgery.     
In my practice, having used a variety of “techniques” for correction of medial breast implant displacement, tenting or symmastia, I find that the most reliable technique involves a 2 layer capsulorrhaphy (internal suture repair of the breast implant pockets along the cleavage area). Often, the use of acellular dermal matrix is helpful also. I have also been pleased with the (at least partial) correction of skin tenting that can be achieved with the use of the acellular dermal matrix.
Often, it is necessary to “open” (reverse capsulotomy) the breast implant pocket laterally (outer breast fold) to allow for positioning of the implant centrally behind the breast mound. This maneuver may also decrease the amount of implant pressure against the medial suture line.  Sometimes, the use of smaller and/or narrower breast implants be helpful.
I also find that careful attention to postoperative activity restrictions is key to success with this type of surgery and other types of implant malposition revisionary breast surgery.  For example, for most of my medial malposition or symmastia patients, I ask that they avoid pec major related exercises ( especially exercises that involve abduction of their arms) for at least three months after the procedure is performed.
  Best wishes.