Disagreements aren't necessarily bad. Couples that never argue are often in pretty boring relationships. Whatever the area of conflict, though, resolving the inevitable disagreements in relationships requires effective communicating. Communication is a skill, and skills can be developed. If you are good at verbal interaction with your partner, you may have learned it from watching your family of origin handle disagreements in healthy ways.
If your family didn't handle this sort of thing effectively when you were young, however, you may find that communication is a frustrating or difficult experience for you. Did you ever watch someone try to communicate with a non-English speaker by over-enunciating each word they speak, or by talking very loudly? We sometimes do the same thing with one another. Some people deal with that frustration by turning up the volume and becoming aggressive with their partner. Others of us may withdraw from conflict out of anxiety or fear.
A relationship with two high-volume guys is likely to be energetic but overheated at times. Two conflict avoiders may have a placid relationship, but each partner may feel rather disconnected from the other. You can learn to communicate, even if it feels a bit like going against your nature. Here are some guidelines: