male companion
More than a boyfriend less than a husband
Angelina & Brad more than a boyfriend but not a husband, he is often referred to as her male companion.
Temporary Male Companion
How I introduce my boyfriend to other people when I'm pissed at him or when a breakup is inevitable.
Jake: Hey Jeff! Well well well, who do we have here?
Jeff: This is Neil, my temporary male companion.
Neil: Not very nice.
Jeff: This is Neil, my temporary male companion.
Neil: Not very nice.