Hate oral sex

My boyfriend insists on oral sex even when I have sores on my mouth. Is there any way to protect him and me from this sexual activity? I also hate swallowing semen.

Yes, several things you can do. The first one is to abstain from oral sex, which may not be a good enough answer for either of you. The second is to perform oral sex by insisting your boyfriend wear a condom. Today, there are many flavored types of condoms available, but in the end, you will still feel like you are sucking on rubber. There are some exotic dental dams that you can use. These devices are very uncomfortable, never fit properly in the mouth, make it difficult to suck on the penis and you will gag constantly. Leave these crap devices for the dentist and not oral sex. So those are your limited choices. 

If you hate swallowing semen, you can either spit it out or let your boyfriend pull out as soon as he is coming. More often than not, the semen is all over your face and hair. Not a lot of great options.