<human>: Can you condense the text into a few key points?

I started a new job in January as a server. A coworker and I began flirting and it was pretty innocent. We went to a coworker's 21st birthday and I got drunk for the first time. He helped me through it and let me stay the night at his house so I wouldn't drive drunk. We ended up making out. 

When I was sober we talked through what happened and decided to be friends with benefits. I have since been over 3 or 4 times for sex and talking. No dates, no eating meals together, no movies, no relationship. We aren't facebook friends or anything. 

His father just had a heart attack and I was one of the first people he called. He said he wanted to hear my voice and it would calm him down. We talked for a bit and he said he would update me. His father never woke up from his coma and passed the next day. I want to be supportive and be there for him. He has a lot of friends and family helping him out. I just don't know how to proceed because I do not want him to lean on me or bond with me emotionally, but I want to be there for him as a friend. I definitely care about him I don't know how to treat the situation. 
Thank you for reading.
<bot>: I started a fling with a coworker for casual sex. His father died suddenly and he is turning to me for emotional support. What do?