<human>: My gf and I have been together for 16 months. We live together and have talked a lot about future plans together.

In November of last year an old friend reached out to her on Facebook. She hadn't heard from him in 3-4 years because his ex didn't want him speaking with her. 

Well they have text every now and then since then and sometimes the texts have been out of line- talking about how he wishs he could be with her, how attractive she is, etc... My girlfriend shares these texts with me as she said she would feel uncomfortable if a girl was saying such things to me.

A couple times I mentioned wanting to meet him and he always cancels. 

My girlfriend and him have grabbed coffee a couple times and she has admitted she's used this when she is upset with me cause she knew I wouldn't like that.

So they hadn't text for a couple weeks but now he has asked her to go stay at a water park this weekend with some mutual friends, I cannot go as there is only one spot but she can take her daughter (4)? She said no which again helps affirm my trust in her. 

He now has asked her to lunch this week and coffee again this week. 

Is there anything I can or should do here or do I just need to trust that my girlfriend will continue to do the right things?

Summarize the given text in a few sentences.
<bot>: old male friend reaches out to my gf. He's pushy and wants time with her, has made a lot of inappropriate comments to her. Refuses to meet me.