Are you discontinuing breastfeeding because of him biting you? Because if that is the issue, it might be better to find a way to help him stop that and continue to breast feed rather than to give him a bottle. It is recommended that because the mother has a nursing relationship that someone else gives the bottle. Now, you mentioned that you are the only one feeding him...does he go to child care at all? If he does, the care give might be a good person to give him a bottle of formula.
The other thing to think about is the formula itself. It might not be something that tastes good to him in which case, trying another brand or formulation (eg. soy vs. milk base) to see if it is the taste that is the problem. You mentioned that you tried mixing the breast milk in with the formula but have you tried just breast milk? If he is not taking breastmilk out of the bottle than you know that he only associates milk from the breast. If he does take the breast milk, than it might be that he doesn't like the formula.
Besides, it is not a good idea to be giving liquids other than formula or breast milk out of the bottle. Since in the long run, it will make it far more difficult to transition him off the bottle. If he has the association that only milk comes from the bottle and everything else that he drinks comes from a cup, than it will be easier for him to stop drinking from the bottle.
Whoops...I just saw that you are a stay at home mom...so there is no childcare. Are there family members that can offer it to him from time to time? If nothing else, it would be nice for you to get out and know that your baby is getting formula or breast milk while you are gone.
Good luck. It is going to be a hard sell to your baby if you have been breast feeding him and he is not yet ready to wean. Unless you have someone available to help you give him a bottle when you are out of the house, some babies are just not willing to take a bottle when they know that your breast is just inches away.
If you need some suggestions as to how to prevent your little one from biting you, let me know and I can tell you what I did when we ran into this problem. It is certainly not easy. I realize that what ever decision you make in terms of breast feeding that you need to get him to take a bottle or cup from someone else so that you can have time away. It can't be an easy thing to do with a husband that is away for long periods.
Be well!