***Unless communion is being offered under both species (body & blood) I doubt that you will find a priest that will give you only the blood just because *that is what you prefer. If you have a good reason not to receive under the appearance of bread (gluten allergy, radiation tx. to the throat, difficulty or unable to take solid foods, etc.) then there shouldn’t be any problem. But, just because that is what you prefer - probably not.
If communion is being offered under both species, then you can get in line and just receive from the cup. If this is your regular parish, then I would speak to the pastor first, so he knows you reason and to make sure you are doing so for a justified reason.