<human>: Can you condense the text into three sentences or less?

I've barely seen her in the last few weeks. Includes weekends. Maybe 4-5 times. When we're together, she's completely with me. There couldn't be anyone else in the world. We've known each other for 2+ years, and been very close on a lot of subjects. We have both just got out of long relationships, and she has said that she isn't ready to commit to anything yet.

Talked to her roommate today. He (gay male, early 20s) said that she had slept with someone that she had met on Tinder in the last 3 weeks, and is meeting up with someone else next week. 

We have never said we were exclusive, but it still hurts me because I had hoped that we were, or that the possibility of it could exist. 

I have danced around the subject with her, and she has denied it. Only saying that she is too selfish to commit to me. But she tells me that she loves me, and that no one in the world has ever taken care of her like I do. 

They have a long lease together, and are also co-workers. If I confront her about it, I'm worried it may put a massive strain on their relationship. 

On the OTHER hand, her roommate also works a night job and isn't home until very late most nights. How can I be sure that this is true?
<bot>: Not exclusive relationship. She claims to be in love, roommate says she's exploring other options, and I feel hurt. Am I right to feel this way? Should I confront her?