Caught my boyfriend get a message from a girl on Tinder?

Iamthecutegirl
My boyfriend of two years, went away to work for three weeks, 3 hours away from home, he came back in the weekends. While he was away he downloaded a dating App called Tinder, he didn't tell me and he didn't delete it after checking it out. He logged off when he cane home in the weekend and went back on when he left back to work (as far as I know), I didn't know any of this until yesterday I saw his phone go off and I saw a message from a girl on Tinder. I asked and he said it was nothing and it's 'only tinder', it's a joke he said. His friend was there with him at the time and he also downloaded it to his own phone (his friend is single). He tells me he was bored at the time, and he loves me and would never cheat on me. He told me he only messaged her out of curiosity to see where she lived, he told her he was bored, which I don't understand why he just didn't message me and tell me that. I don't know what to think or do? I feel uncomfortable that he felt the need to look at other girls, match them, talk to one.. that I know of and hide it from me, if it was purely for fun than why wouldn't he have just told me after? I went on myself and it looks like a hook up site for singles.. I'm really hurt and confused and not to mention I moved 24 hrs away from my home country to be with him 6 months ago. Please share your opinions or advice.
Caught my boyfriend get a message from a girl on Tinder?
6 Opinion